(HealthDay News) -- Fluctuations in hormone levels and other factors during pregnancy can lead to changes in a woman's skin and hair.

The American Congress of Obstetricians and Gynecologists offers these examples:

  • Darkened areas on the skin, often the face and breasts.
  • Ridges in the belly and abdomen called stretch marks.
  • Thicker hair, hair growth in new areas, and possible hair loss after delivery.
  • Spider veins or varicose veins.
  • Itchy red bumps called pruritic urticarial papules and plaques of pregnancy (PUPPP).