a blue embryo floating on a white background

THE EMBRYO PROJECT ENCYCLOPEDIA

Recording and contextualizing the science of embryos, development, and reproduction

Recently published

The Mother and Child Health Handbook (2008), by the Palestinian Ministry of Health

Aug 25, 2026

In 2008, the Palestinian Ministry of Health published the Mother and Child Health Handbook, herafter the Handbook, to help improve health outcomes…

Maternal health services Maternal-Child Health Services Infant Health Services

Combination Oral Contraceptives for Treatment of Polyendocrine Metabolic Ovarian Syndrome

Aug 24, 2026

For women with polyendocrine metabolic ovarian syndrome, or PMOS, combination oral contraceptives are a first-line treatment. PMOS is a reproductive…

Women’s Health Contraceptives, Oral Contraceptives, Oral, Hormonal

Effects of Metformin on Spontaneous and Clomiphene-Induced Ovulation in the Polycystic Ovary Syndrome by John E. Nestler, Daniela J. Jakubowicz, William S. Evans, and Renato Pasquali

Aug 23, 2026

In 1998, physician John E. Nestler and colleagues published “Effects of Metformin on Spontaneous and Clomiphene-Induced Ovulation in the Polycystic…

Metformin Polycystic ovary syndrome Hyperandrogenism

Recent news

Map of Arizona

Browse by subject

Abortion Development Embryology Ethics Eugenics Evolution Genetics Law Reproduction Sex and gender Technology Stem cells

an illustration of an embryo and a uterus

See what's new over at Embryo Tales, our partnership with

ask a biologist

The Encyclopedia has a rich collection of historical photographs and custom illustrations View images

The Embryo Project is supported by the National Science Foundation, Arizona State University, Center for Biology and Society, the Max Planck Institute for the History of Science in Berlin, and the MBL WHOI Library.