<unk>  is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse, which can lead to twin babies from two separate biological fathers. The term<unk>  is derived from fecund, meaning the ability to produce offspring. Homopaternal<unk>  refers to the fertilization of two separate ova from the same father, leading to fraternal twins; while heteropaternal<unk>  is referred to as a form of atypical twinning where, genetically, the twins are half siblings – sharing the same mother, but with different fathers.
Superfecundation
Instillation abortion
Menstruation
Spontaneous conception
Abortion
Ovarian stimulation
Obstetric transition
Ovulation induction