Biology · Ch 2 — Reproduction in Lower and Higher Animals
Pregnancy
2.7
Pregnancy
Pregnancy is the condition of carrying one or more embryos within the uterus; it is also called gestation, and refers to the whole period between fertilization of the egg and parturition. The average human pregnancy lasts 266 days counted from fertilization, or 280 days (266 + 14) when counted from the last menstrual cycle (LMC). This roughly nine-month period is conven …