Unlike the «old days», thankfully today there is an increased understanding of the natural hormonal influences on the body and mind of the 21st century woman. (ericbakker.com)
Researchers have seen such hormonal influence in other animals, including lab rats and cows. (scientificamerican.com)
I have never supported young age altering, and retrospective studies are now showing that the loss of hormonal influence at an age of ten or 12 weeks is detrimental. (animalwellnessmagazine.com)