Sexual reproduction involves the joining of two sex cells or gametes – the sperm (male gamete) and the egg or ovum (female gamete). The male and female reproductive system The male reproductive ...

Controlled by chemical signals called hormones, the menstrual cycle prepares the female reproductive system for pregnancy ... 28 If the ovum does not join with a sperm cell in the oviduct ...

An anembryonic pregnancy, also known as a blighted ovum ... reproductive health issues like Polycystic Ovary Syndrome," says the expert. Immune or hormonal issues: Problems with the immune system ...