Pregnancy is, hormonally speaking, the most elevated state of adult female life. The hormonal concentrations of pregnancy — estrogen, progesterone, hCG — reach levels that dwarf anything experienced during the normal reproductive cycle. The physical and biological transformation is total: virtually every organ system is affected, and the skin is no exception.

Some pregnancy skin changes are welcome — the famous "glow" is real and biologically explained. Others are less so — melasma, stretch marks, blemishes, and hypersensitivity are equally real and equally biological. Understanding what is driving each change provides the foundation for responding to it appropriately — and for making informed decisions about what is safe to use on your skin while growing a human.

Important disclaimer: This post is educational — it is not medical advice. Please consult your obstetrician, midwife, or dermatologist before changing your skincare routine during pregnancy. Every pregnancy is different, and your healthcare provider is the appropriate person to advise on what is right for your specific situation.

Pregnancy begins at fertilization and is immediately characterized by the production of human chorionic gonadotropin (hCG) by the developing embryo — the hormone detected by pregnancy tests. hCG signals the corpus luteum to continue producing progesterone rather than degenerating, maintaining the uterine lining for implantation.

As pregnancy progresses, the placenta takes over hormone production — becoming the primary source of estrogen and progesterone for the remainder of gestation. The hormonal concentrations of late pregnancy are extraordinary: estrogen levels at term are approximately 100 times higher than peak levels during the normal menstrual cycle, and progesterone levels are similarly elevated. [1]

The trimester hormonal arc:

• First trimester: hCG peaks around week 10, driving many early pregnancy symptoms. Progesterone rises to prevent uterine contractions. The nausea of early pregnancy is partly driven by hCG's effects on the same receptors that regulate thyroid function.
• Second trimester: The placenta fully takes over hormone production. hCG declines. Estrogen and progesterone continue rising. Many women feel their best during this period — the nausea has resolved and the hormonal environment is stabilizing.
• Third trimester: Estrogen and progesterone reach their pregnancy peaks. The body prepares for labor through the production of relaxin and prostaglandins. Cortisol rises in preparation for the physiological stress of delivery.

hCG (human chorionic gonadotropin): Produced by the developing embryo from the moment of implantation. Maintains the corpus luteum's progesterone production in early pregnancy. Responsible for many first-trimester symptoms — nausea, breast tenderness, fatigue — through its effects on multiple receptor systems. Its rapid rise in the first weeks of pregnancy is what makes it a reliable early pregnancy marker. [1]

Estrogen — elevated to extraordinary levels: Estrogen during pregnancy is produced first by the corpus luteum, then increasingly by the placenta in collaboration with the fetal adrenal glands and liver. Estradiol, estriol, and estrone all rise during pregnancy — with estriol (normally a minor estrogen) becoming the dominant estrogen of pregnancy. The cumulative estrogenic effect drives breast development, uterine growth, increased blood volume, and many of the skin changes of pregnancy. [2]

Progesterone — the pregnancy-maintaining hormone: Progesterone rises throughout pregnancy, reaching 10-15 times its normal luteal-phase peak. Its primary role is maintaining uterine quiescence — preventing the contractions that would prematurely end the pregnancy. Its effects on skin include increased sebum production in some women (through a mild androgenic-like effect at high concentrations) and contribution to the hyperpigmentation of pregnancy through melanocyte stimulation. [1]

Relaxin: A peptide hormone produced by the corpus luteum and placenta that relaxes the ligaments and connective tissue of the pelvis in preparation for delivery. Relaxin's effects extend beyond the pelvis — it affects collagen remodeling throughout the body, contributing to the joint laxity, postural changes, and skin elasticity changes of pregnancy. It is one factor in the development of stretch marks through its effects on dermal collagen organization. [2]

Prolactin: Produced by the pituitary gland throughout pregnancy in preparation for breastfeeding. Prolactin's skin effects are mild during pregnancy itself but become more significant postpartum when it drives milk production and has notable effects on skin and hair.

MSH (melanocyte-stimulating hormone): MSH rises during pregnancy — stimulating melanocyte activity and driving the hyperpigmentation changes characteristic of pregnancy. The linea nigra, darkening of the areolae, and melasma are all direct MSH effects. [2]

Cortisol: Cortisol rises progressively through pregnancy — partly as an adaptive response to the metabolic demands of gestation and partly in preparation for the physiological stress of labor. Elevated cortisol contributes to the barrier changes and potential sensitivity of pregnancy skin.

Skin

Pregnancy produces more diverse and more dramatic skin changes than any other hormonal state — reflecting the extraordinary hormonal concentrations involved and their effects on virtually every skin cell type.

The glow — it's real: The pregnancy glow is not a myth — it is the result of two converging mechanisms. Increased blood volume (blood volume increases approximately 50% during pregnancy) produces increased dermal blood flow, giving skin a flushed, luminous appearance. Estrogen's effects on sebaceous glands increase surface lipid production in many women, creating a natural sheen. The result is genuinely more radiant-looking skin that many women notice in the second trimester. [2]

Melasma — the mask of pregnancy: Melasma — patchy brown hyperpigmentation typically affecting the cheeks, forehead, upper lip, and chin — develops in up to 70% of pregnant women. It is driven by the combination of elevated MSH and estrogen stimulating melanocyte activity, combined with UV exposure as the co-trigger. Sun avoidance and consistent SPF are the most important interventions — most melasma partially or fully resolves after delivery as hormone levels normalize, but UV exposure during pregnancy can produce permanent pigmentation changes. [3]

Linea nigra: The dark vertical line that appears on the abdomen during pregnancy — running from the pubic bone to the navel and sometimes beyond — is a direct MSH effect on the melanocytes of the linea alba. It typically fades significantly after delivery but may not completely disappear.

Stretch marks (striae gravidarum): Stretch marks develop in approximately 50-90% of pregnant women — primarily on the abdomen, breasts, hips, and thighs. Their development reflects the combination of rapid skin stretching, relaxin-mediated collagen reorganization, and genetic predisposition that determines individual collagen fiber resilience. [2]

The honest reality about stretch marks: no topical product has been demonstrated in rigorous clinical trials to prevent their formation. Keeping skin well-moisturized supports skin comfort and elasticity but does not change the fundamental biology driving stretch mark development. Products that claim to prevent stretch marks are making promises the evidence does not support.

Blemishes: Pregnancy affects sebaceous activity variably — some women experience improvement in blemish-prone skin (through the anti-androgenic effects of progesterone at high concentrations); others experience significant worsening (through progesterone's mild sebaceous-stimulating effects or the general hormonal volatility of the first trimester). Both responses are biologically normal. The challenge is that many conventional blemish treatments — retinoids, certain antibiotics, salicylic acid at high concentrations — are not appropriate during pregnancy. [3]

Vascular changes: The increased blood volume and estrogen-driven vasodilation of pregnancy produce spider angiomas (small dilated blood vessels visible on the skin surface), palmar erythema (redness of the palms), and in some women significant facial flushing. These typically resolve postpartum as hormone levels normalize.

Barrier changes: Pregnancy produces mixed effects on barrier function. The increased sebum production and blood flow of mid-pregnancy can improve barrier appearance; the elevated cortisol and hormonal volatility of the first and third trimesters can compromise it. Many pregnant women notice increased skin sensitivity — to products previously tolerated, to environmental triggers, and to fragrance — particularly in the first trimester.

PUPPP (Pruritic Urticarial Papules and Plaques of Pregnancy): A specific pregnancy dermatosis — itchy hives and plaques that develop in stretch marks, typically in the third trimester of a first pregnancy. PUPPP is not dangerous to mother or baby but is extremely uncomfortable. It requires medical evaluation and management — not skincare. See your OB-GYN or dermatologist if you develop significant skin changes during pregnancy beyond the cosmetic changes described above.

Blood Volume and Circulation

Blood volume increases by approximately 50% during pregnancy — the most dramatic cardiovascular change of gestation. This increase supports the growing placenta and fetus, but also has direct skin consequences: the increased dermal blood flow that produces the glow, the greater susceptibility to flushing and temperature sensitivity, and the venous changes (varicose veins, spider veins) that can develop as venous pressure increases.

Musculoskeletal — Relaxin and the Changing Body

Relaxin relaxes the ligaments of the pelvis in preparation for delivery — but its effects extend throughout the musculoskeletal system. Joint laxity increases across the body, producing the characteristic waddling gait of late pregnancy and increasing injury risk. The postural changes of a growing abdomen — shifting the center of gravity forward — place increased stress on the lower back, hips, and pelvis. [1]

Breast Development

The breast changes of pregnancy — enlargement, darkening of the areolae, development of Montgomery glands (the small bumps around the areola) — are driven by the combined effects of estrogen, progesterone, and prolactin preparing the breast tissue for lactation. The skin of the breast stretches significantly and may be particularly prone to stretch marks and itching.

Metabolism and Weight

Pregnancy demands significant metabolic adaptation — increased caloric requirements, altered fat metabolism (fat is preferentially stored in early pregnancy and mobilized in late pregnancy to support fetal growth), and insulin resistance that increases throughout pregnancy as placental hormones antagonize insulin action. The physiological insulin resistance of pregnancy is the mechanism of gestational diabetes in women whose pancreas cannot compensate with increased insulin production. [1]

Sleep

Sleep disruption during pregnancy is nearly universal — driven by physical discomfort (particularly in the third trimester), frequent urination, and the hormonal and anxious emotional state of approaching parenthood. Sleep deprivation during pregnancy has downstream consequences for skin through the same cortisol and growth hormone pathways that make sleep important at every life stage.

Mood and Emotional Experience

The emotional experience of pregnancy is complex — driven by the hormonal environment, the psychological significance of the transition, the physical experience of a changing body, and the social context of becoming a parent. Progesterone at high concentrations has mild anxiolytic (anti-anxiety) effects for some women; for others, the first-trimester hormonal volatility produces significant mood disruption. The anxiety of pregnancy — about the health of the baby, about childbirth, about parenthood — is entirely normal and does not reflect inadequate emotional resilience. [2]

Immune Modulation

Pregnancy requires a remarkable immunological adaptation — the maternal immune system must tolerate the fetus (which is genetically foreign, containing paternal antigens) without suppressing immunity to infection. This is achieved through complex regulatory mechanisms that shift the immune balance away from the inflammatory responses that would reject the fetus. The practical consequence is that some autoimmune conditions improve during pregnancy (rheumatoid arthritis, for example) while others worsen (lupus, in some cases). Skin conditions with autoimmune components — psoriasis, eczema — may improve or worsen depending on which direction the pregnancy-induced immune shift moves them. [2]

Pregnancy is the most critical window for EDC concern — because EDC exposure during pregnancy affects not just the mother but the developing fetus, whose endocrine system is forming during precisely this period.

The fetal endocrine system begins developing in the first trimester — the period when organogenesis is most active and most sensitive to disruption. EDCs that cross the placenta (many do) interact with a developing system that has not yet established the regulatory feedback mechanisms that provide some degree of adult resilience.

The specific concerns:

• Phthalates — cross the placenta; associated in studies with altered fetal testosterone levels in male fetuses and changes in female reproductive development
• Parabens — detected in cord blood and breast milk in studies; estrogenic activity
• Oxybenzone — detected in cord blood; estrogenic activity; this is one reason mineral SPF is preferred in pregnancy
• BPA — while less common in skincare than in food packaging, worth avoiding where present [4]

Every Juventude product is cross-referenced against six independent safety databases for endocrine-disrupting compounds — making the line particularly appropriate for the pregnancy skincare context where EDC avoidance matters most.

The following ingredient categories are generally recommended to avoid during pregnancy based on current evidence and medical consensus. This is not a complete medical list — always discuss your full skincare routine with your OB-GYN or dermatologist.

• Retinoids (retinol, tretinoin, retinaldehyde, adapalene, tazarotene): The most important pregnancy skincare contraindication. Oral retinoids (isotretinoin) cause severe birth defects — this is established. The risk from topical retinoids is much lower given limited systemic absorption, but the potential consequences are serious enough that all retinoid use is recommended to be avoided during pregnancy as a precautionary principle. This includes over-the-counter retinol. [3]
• High-concentration salicylic acid: Oral salicylates at high doses are associated with fetal harm. Topical salicylic acid at low concentrations (as in many toners and cleansers) is generally considered lower risk, but high-concentration peels and treatments should be avoided. Discuss with your healthcare provider.
• Hydroquinone: Used for hyperpigmentation and melasma. Significant systemic absorption (35-45% of topical application) combined with limited safety data in pregnancy leads to a general recommendation to avoid during pregnancy. [3]
• Chemical sunscreen filters (oxybenzone, avobenzone, octinoxate): Oxybenzone in particular has documented hormonal activity and is detected in cord blood. Mineral sunscreens (zinc oxide, titanium dioxide) are the recommended SPF choice during pregnancy.
• Formaldehyde and formaldehyde-releasing preservatives: Found in some nail products and hair treatments. Known carcinogen and sensitizer — avoid during pregnancy and generally.
• Essential oils at high concentrations: Some essential oils have uterotonic effects (stimulating uterine contractions) at higher concentrations — including clary sage, rosemary, and certain citrus oils. Trace amounts in cosmetics are generally considered low risk, but high-concentration essential oil products are best avoided during pregnancy. [3]

• Hyaluronic acid — minimal systemic absorption, no known fetal risk. Appropriate for pregnancy hydration needs.
• Glycolic acid and lactic acid (at low concentrations) — generally considered lower risk at cosmetic concentrations. Higher-concentration peels should be discussed with your healthcare provider.
• Azelaic acid — considered safe during pregnancy; useful for both blemish-prone skin and mild hyperpigmentation management.
• Niacinamide — generally considered appropriate for pregnancy use at cosmetic concentrations.
• Vitamin C (L-ascorbic acid) — topical vitamin C is generally considered appropriate; its antioxidant and mild brightening effects are relevant to the pigmentation concerns of pregnancy.
• Bakuchiol — not a retinoid; does not share retinoids' mechanism of action or their fetal risk profile. Generally considered appropriate for pregnancy use, though the specific pregnancy safety data is more limited than for some other ingredients. Discuss with your healthcare provider. [3]
• Mineral SPF (zinc oxide, titanium dioxide) — the preferred sunscreen choice during pregnancy. Sits on the skin surface rather than being absorbed, with no documented fetal risk.