Connective tissue changes are caused by increased estrogen, adrenocorticoids, and relaxin along with stretching that occurs as the gravid uterus grows and maternal weight increases.
These changes are seen as skin tags and "stretch marks "or striae gravidarium.
The hormones of pregnancy cause collagen adhesiveness to relax and fibers to separate (Rapini).
Skin tags are soft and have a pedicle that attaches them to the skin surface; they appear on the neck, axillae, groin, and between and under the breasts.
Stretch marks occur on the abdomen, breasts, thighs, and buttocks. Striae are more prevalent in younger, Caucasian women in their first pregnancy.
Obesity, large babies, and maternal family history also contribute. Stretch marks will fade after pregnancy, but will not disappear.