Fertility and SterilityVolume 33, Issue 2, February 1980, Page 213LETTERS TO THE EDITORTo the EditorAuthor links open overlay panelWilliam Y. Ling Ph.D. (Assistant Professor)Show moreShareCitehttps://doi.org/10.1016/S0015-0282(16)44550-4Get rights and contentUnder an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1980 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.