Pregnancy is when a woman's egg has been fertilized by a man's sperm and thusly creates a baby that grows inside the woman's womb. At first there are no physical signs of the woman even being pregnant. Later on, clear signs of pregnancy can seen, such as enlarged breasts from the production of milk, and her body will become curvier and rounder. The most obvious change is that her belly become huge and protrude far outward as the baby grows inside. Around the ninth month of pregnancy the woman will give birth to her baby through her vagina.

Pregnant women are seen as being very sexy to some. Being with a pregnant woman is desirable for many reasons, be it a desire for milk, enlarged body parts or their fertility.