| Lactational amenorrhea | |
|---|---|
 An infant breastfeeding | |
| Background | |
| Type | Behavioral |
| First use | Prehistory; Ecological method 1971 |
| Failure rates (First six months postpartum) | |
| Perfect use | <2% |
| Typical use | ? |
| Usage | |
| Duration effect | Up to 6 months (longer in some cases, with greater failure rate) |
| Reversibility | Yes |
| User reminders | Adherence to protocols |
| Clinic review | None |
| Advantages and disadvantages | |
| STI protection | No |
| Periods | Absent |
| Benefits | No external drugs or clinic visits required |
Lactational amenorrhea, also called postpartum infertility, is the temporary postnatal infertility that occurs when a woman is amenorrheic (not menstruating) and fully breastfeeding.