Better adaptability: Increased variability because of sexual reproduction helps in better adaptability of species.Evolution: It helps from the evolution of species. If a fertilized egg implants within the endometrial lining from the uterine wall, the embryo produces a hormone called human chorionic gonadotropin (hCG) that maintains the corpus luteum. Arachnids https://reproduction-in-man85174.laowaiblog.com/21718467/what-organ-produces-the-female-gametes-options