Primitive reflex found in infants of humans and most primates. Occurs in utero by 28 weeks, sometimes as early as 16 weeks. Persists until development of fine motor skills between 2-6 months. Can be reversed by stroking back or side of hand
Implantation bleeding is light spotting indicating egg attachment to uterus. Occurs around 9 days after conception, sometimes within 2 weeks. Affects 33% of pregnant women. Usually pink or brown in color, lasting 24-48 hours
Menstrual cycle prepares body for pregnancy with 28-day period. Ovulation occurs halfway through cycle, releasing mature egg into uterus. Fertile window is 3 days before and up to ovulation. Sperm can live 3-5 days in reproductive organs
Visit doctor before trying to conceive to rule out medical issues. Get enough folic acid before pregnancy to protect against birth defects. Ovulation is best time to conceive, indicated by thin, slippery cervical mucus
Peripartum refers to the period immediately before and after childbirth. Antepartum refers to the period before childbirth, from conception to labor
Pregnancy begins when last menstrual period occurs. Embryo implants 7-9 days after ovulation. Beta-hCG hormone begins to be released. Gastrulation occurs, forming three cell types