[nwyori]

I found an interesting paper on IGF-1. The idea is, for women taking supplement estradiol, if their IGF-1 also increased within one month, they’d be successful with NBE. Otherwise, nothing happens. That might be one of the reasons why some people don’t see growth despite doing the same program? Another paper talks about the differential IGF-19 repeat allele among ethnic groups. Non-white women usually lack it; they would experience more breast growth while on BC and after pregnancy.