Marilyn Monroe and husband Arthur Miller tried to have a baby together. Marilyn was diagnosed with endometriosis after a miscarriage. In 1956, she lost her first child from a miscarriage, she was only about 3 months along. Her second miscarriage, her most public (photographed above), was her miscarriage on August 1st, 1957. Marilyn was in her home when she felt severe abdominal pain and could hardly stand. She was rushed to the hospital and suffered an ectopic pregnancy. The fetus was grown outside of the womb causing the baby not to grow to full term. She was then officially told is was due to endometriosis which is caused by menstrual cramps. She conceived another baby in 1958 but miscarried after about 4 months of pregnancy. Marilyn never had a child of her own.