double fertilization The process found in most flowering plants where two male gametes enter the embryo sac and both participate in fertilization. One male gamete fuses with the female gamete or egg nucleus to form a * zygote , which develops into the embryo.
Sep 27, 2018 · A blighted ovum (also known as an anembryonic pregnancy) is a type of very early miscarriage, when a fertilized egg never develops into an embryo.Because it happens so early on in a pregnancy — within just a few weeks of ovulation and fertilization — many women don’t even know it’s occurred.
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Oct 25, 2018 · Fertilization can occur as long as there is an egg waiting for the sperm to fertilize it. An egg can survive for 12-24 hours, but sperm can live up to 5 days or even longer inside the woman's body. This means that, even if there is no egg in the tube when you have intercourse,...