The New England Journal of Medicine, 345(19), 1400-1408, 2002
The implantation of fertilized ova and the formation of the placenta are crucial steps in reproduction. This review summarizes current information about these steps, including some of the molecular mechanisms that mediate them and how they may go awry, with consequent loss of the pregnancy.
Norwitz, E. R., Schust, D. J., & Fisher, S. J. (2001). Implantation and the survival of early pregnancy. *The New England journal of medicine*, *345*(19), 1400-1408. https://doi.org/10.1056/NEJMra000763
Norwitz ER, Schust DJ, Fisher SJ. Implantation and the survival of early pregnancy. N Engl J Med. 2001;345(19):1400-1408. doi:10.1056/NEJMra000763
Norwitz, Errol R., et al. "Implantation and the survival of early pregnancy." *The New England journal of medicine*, vol. 345, no. 19, 2001, pp. 1400-1408.
Abortion, Spontaneous/etiology, Blastocyst/cytology/physiology, Embryo Implantation/physiology, Female, Humans, Placentation, Pregnancy, Pregnancy Complications, Pregnancy Trimester, First/immunology/physiology, Progesterone/physiology, Prostaglandins/physiology, Prostaglandins, Progesterone