Definition that contains fertilized ovum
- monozygotic twin either of two twins developed from the same fertilized ovum (having the same genetic material)
- monozygous twin either of two twins developed from the same fertilized ovum (having the same genetic material)
- fertilization membrane the membrane that forms around a fertilized ovum and prevents penetration by additional spermatozoon
- morning-after pill a large dose of estrogen taken orally within 24 to 72 hours after intercourse; prevents implantation of a fertilized ovum and so acts as a contraceptive; commonly used after rape or incest
- identical twin either of two twins developed from the same fertilized ovum (having the same genetic material)