The term “pregnancy glow” describes a common, noticeable shift in a pregnant person’s appearance that results in increased skin radiance and luster. This phenomenon has clear biological underpinnings, resulting from profound physiological shifts happening inside the body to support the growing fetus. Understanding the science behind this luster explains why it occurs and how long it can be expected to last.
The Physiological Reasons for the Glow
The characteristic radiant look is primarily driven by two major changes in the body’s systems. One significant factor is the dramatic increase in blood volume, which can rise by up to 50% during pregnancy. This expanded circulatory system leads to better blood flow throughout the body, including the skin.
The increased circulation causes the tiny blood vessels near the skin’s surface to dilate, giving the complexion a flushed, rosy, and healthy appearance, particularly visible on the cheeks. This heightened blood flow also improves the delivery of oxygen and nutrients to the skin cells.
Another mechanism is the influence of elevated reproductive hormones, namely estrogen and progesterone. These hormones stimulate the sebaceous glands, which produce the skin’s natural oils. The increased oil production contributes to a dewy, hydrated appearance on the face. However, this boost in oil can sometimes lead to clogged pores and pregnancy-related acne breakouts.
The Expected Timeline of the Glow
The timeline for experiencing the pregnancy glow varies, and it is typically not present from the very beginning of the pregnancy. Many individuals find that the first trimester is characterized by fatigue and nausea, which can overshadow any potential radiance. The glow is often minimal during this initial phase as the body adjusts to rapid hormonal changes.
The glow tends to become most noticeable and consistent during the second trimester, around week 16, and often peaks during this time. By the second trimester, the body’s blood volume has stabilized at a significantly higher level, and initial symptoms of morning sickness have generally subsided. This period represents a relative equilibrium where hormonal and circulatory changes are fully expressed, resulting in the most vibrant skin.
The pregnancy glow fades rapidly after delivery. The immediate expulsion of the placenta removes a major source of pregnancy hormones, causing estrogen and progesterone levels to drop precipitously. Furthermore, the body immediately begins to shed the excess fluid and blood volume accumulated during gestation. Most women see the radiant appearance diminish within the first few days to weeks following childbirth.
Postpartum Skin and Hair Changes
Once pregnancy hormones quickly recede, the skin and hair enter a transition phase that can last for several months. The sudden reduction in blood volume and fluid retention, which previously contributed to the plump, radiant look, can temporarily leave the skin looking less vibrant. This is a normal part of the body’s return to its pre-pregnancy state.
The normalized hormone levels also often lead to a decrease in oil production, which can cause the skin to become drier than it was during pregnancy. For some, the hormonal shift can trigger postpartum acne as the skin rebalances its oil output. These skin changes are usually temporary and resolve as the body’s endocrine system finds its new rhythm.
The most dramatic change is often seen in hair density. High estrogen levels during pregnancy prolong the hair growth phase, leading to thicker hair, but once hormone levels drop postpartum, this excess hair sheds rapidly (telogen effluvium). This noticeable hair loss typically begins three to six months after birth and can last for several months until the hair growth cycle normalizes.