Taking a basal follicle-stimulating hormone history is essential before initiating in vitro fertilization.

Roberts JE, Spandorfer S, Fasouliotis SJ, Kashyap S, Rosenwaks Z.

Fertil Steril. 2005 Jan;83(1):37-41.
https://www.ncbi.nlm.nih.gov/pubmed/15652884