American Pregnancy Association change during pregnancy American Pregnancy Association between 40 and 50 percent American Pregnancy Association American Pregnancy Association postpartum hair loss, occurs around 1-5 months American Pregnancy Association American Pregnancy Association American Pregnancy Association American Pregnancy Association estrogen, which they say makes your hair grow faster pregnancy between 40 and 50 percent American Pregnancy Association American Pregnancy American Pregnancy Association hair thickness during pregnancy affects about half of women American Pregnancy Association hair loss during pregnancy is rare imbalance and unpredictable hormone levels American Pregnancy Association American Pregnancy