Women's Biological Clock Revealed: Hormone May Predict Age At Menopause

ScienceDaily (Apr. 29, 2008) — Age at menopause may now be predicted
more realistically according to a new study. The study revealed that
anti-Müllerian hormone (AMH) levels are related to the onset of
menopause and are able to specify a woman's reproductive age more
accurately than chronological age alone.

Read more: http://www.sciencedaily.com/releases/2008/04/080428143108.htm

IVF does not bring on early menopause

IVF does not bring on early menopause, the first long-term study into the effects of the treatment has found. 

For some years, medical professionals have been concerned about whether the two are linked, however, the menopausal age of around 200 women who were among the first to undergo IVF back in the 1980s has been shown to be comparable with the national average. 

Read more: http://www.marieclaire.co.uk/news/health/255569/ivf-does-not-cause-early-menopause.html