> Data that were collected prospectively from a child health study conducted in Gaza show a strong relationship between breastfeeding and two major components of birth intervals, the postpartum anovulatory period and the waiting time [from resumption of menstruation] to conception.
> The finding of a strong positive association between breastfeeding and the length of postpartum amenorrhea is as expected from numerous other studies.
Compare https://pubmed.ncbi.nlm.nih.gov/3726904/ :
> Data that were collected prospectively from a child health study conducted in Gaza show a strong relationship between breastfeeding and two major components of birth intervals, the postpartum anovulatory period and the waiting time [from resumption of menstruation] to conception.
> The finding of a strong positive association between breastfeeding and the length of postpartum amenorrhea is as expected from numerous other studies.