Any sexually active person can be infected with chlamydia. It is a very common STD, especially among young people. Sexually active young people are at high risk of acquiring chlamydia for a combination of behavioral, biological, and cultural reasons.
Fertilization: Sperm Penetrates Egg. It takes about 24 hours for a sperm cell to fertilize an egg. When the sperm penetrates the egg, the surface of the egg changes so that no other sperm can enter. At the moment of fertilization, the baby's genetic makeup is complete, including whether it's a boy or girl.
How long does a robins egg take to hatch? The American Robin will see their eggs hatch in about fourteen  days, after a mating season that lasts from April until July. The  European Robin, a cousin of the American Râ¦obin though not as large  or brightly colored, has roughly the same incubation period. Their  breeding season begins in March.