Related Experiment Video
Updated: May 23, 2026

Transcriptional Analysis by Nascent RNA FISH of In Vivo Trophoblast Giant Cells or In Vitro Short-term Cultures of Ectoplacental Cone Explants
Published on: August 31, 2016
hCG in ectopic pregnancy
1Department of Obstetrics and Gynecology, University of Tennessee Graduate School of Medicine, Knoxville, Tennessee, USA.
Abstract:
Ectopic pregnancies remain an important cause of morbidity and mortality in women of reproductive age. Management of these pregnancies has changed dramatically over the years. Human chorionic gonadotropin (hCG) is a glycoprotein hormone composed of 2 dissimilar subunits, alpha and beta, joined non-covalently. The free beta-subunit is the principal immuno-reactive agent in pregnancy serum samples. Improved diagnostic methods using hCG levels in combination with transvaginal ultrasound have lead to earlier detection rates, subsequent treatment and a reduction in mortality resulting from ectopic pregnancies. This chapter will describe current trends in ectopic pregnancy diagnosis based on hCG levels.
Related Concept Videos
Ovarian Cycle
In Vitro Fertilization
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
Oogenesis
Gonadal and Placental Hormones
In males, testosterone is the primary gonadal androgen. It plays a central role in the maturation of male reproductive organs — the penis and testes. Additionally, testosterone is instrumental in the development of secondary sexual characteristics — a deep voice as well as facial and pubic hair growth — and...