The document discusses three medical advances: in-vitro fertilization, which helps women become pregnant by fertilizing an egg outside of the body; caesarean section, the surgical delivery of a baby through incisions in the mother's abdomen and uterus, which has more risks than vaginal birth; and amniocentesis, a test that removes fluid from around the baby in the womb to check for genetic abnormalities and involves an ultrasound but does not require a hospital stay.