By donor: man’s sperm has a problem, making impregnation impossible, so a donor gives his sperm.
In vitro fertilization: an ovum is fertilized outside a woman’s body. The fertilized ovum is implanted into the uterus.
Fertility drugs: drugs which enhance reproductive fertility. For women, fertility medication is used to stimulate follicle development of the ovary. The side effect is multiple pregnancies. They contain varying amount of FSH and LH.