Research seems to indicate that contraceptives which contain only progestin are generally considered safe for women even when taken daily as pills for several years.
But my wife conceived while taking the pill (maybe because she forgot one day) and later had a miscarriage. At that point she stopped taking the pill and several months later she concieved again and gave birth to a healthy baby (although during the pregnancy some doctors were worried that the fetus growth was not sufficient).
Now that the baby is born, she is reluctant to go back on the pill. She thinks there are healthy risks/side effects for her, the newborn and any future children we may have.
Are these fears warranted? In other words are there any significant and provable risks to a woman, her womb and/or her breastfed infant in using hormone based contraceptives?