BIOLOGY | MEDICAL | HEALTH on Instagram: "Conception is the moment when life begins — when a sperm and egg meet and form a new human blueprint. Here’s what actually happens inside the body: Every month, the ovaries release one mature egg during ovulation. This egg travels into the fallopian tube and survives for about 12–24 hours. When intercourse happens during this fertile window, millions of sperm enter the vagina, but only a few hundred reach the fallopian tube — and only one wins the race.