The predictive value of hCG β subunit levels in pregnancies achieved by in vitro fertilization and embryo transfer: an international collaborative study

Plasma concentrations of human chorionic gonadotropin from the time of implantation until the second week of pregnancy

Elizabeth A. Lenton, Linda M. Neal, R. Sulaiman · Fertility and Sterility · 1982 · 168 citations

Plasma Concentrations, Infertility, Fertility +14

Analysis of the benefits and risks of multiple embryo transfer

Andrew L. Speirs, Michael Gronow, Geoffrey N. Kellow et al. · Fertility and Sterility · 1983 · 130 citations

Developmental Biology, Fertility, Multiple Embryo Transfer +13

The Conservative Surgical Management of Unruptured Ectopic Pregnancy

Alan H. DeCherney, Nathan Kase · Obstetrical & Gynecological Survey · 1980 · 108 citations

Obstetric Surgery, Gynecologic Surgery, Infertility +14

What is a pregnancy? A question for programs of in vitro fertilization

Howard W. Jones, Anı́bal A. Acosta, Mason C. Andrews et al. · Fertility and Sterility · 1983 · 103 citations

Infertility, Developmental Biology, Fertility +12

In Vitro Fertilization and Embryo Transfer

Robert W. Shaw · Postgraduate Medical Journal · 1985 · 50 citations · Full text

Infertility, Developmental Biology, Fertility +10