Early Pregnancy Loss
Early pregnancy loss (EPL) is the spontaneous loss of a clinically confirmed pregnancy before 13 weeks of gestation. It is the most common complication of pregnancy, affecting approximately 10 to 20% of confirmed pregnancies. The majority of isolated losses result from chromosomal aneuploidy in the embryo, and a single loss in an otherwise healthy couple carries a reasonable prognosis for subsequent success without intervention.1
The picture changes with recurrence. Two or more losses define Recurrent Pregnancy Loss (RPL), a clinically distinct entity with a different differential diagnosis and a different evaluation protocol. A couple with two losses is not simply unlucky twice. The probability of a chromosomal explanation for both losses is low enough that a systematic search for treatable maternal and paternal factors is warranted.
Treatable causes of early pregnancy loss include corpus luteum deficiency and progesterone insufficiency, thyroid dysfunction, uterine structural abnormalities (septum, submucous fibroids, isthmocele), antiphospholipid syndrome, inherited thrombophilias, and chronic endometritis. A strategy that systematically addresses thyroid function, thrombophilia, immune dysregulation, and uterine environment produced significantly higher live birth rates in a retrospective cohort of women with recurrent loss, though the benefit was age-dependent. Women under 40 following the strategy had a live birth rate of 78.1%, compared to 42.3% in women managed without it. Among women 40 and older, the difference (55.6% versus 30.0%) did not reach statistical significance.2
RRM does not respond to early pregnancy loss with reassurance and a directive to try again. The first loss is acknowledged. The second triggers evaluation. The evaluation is systematic, not checklist-driven. Each identified finding becomes a treatment target. The hCG trajectory of each subsequent pregnancy is monitored closely, with early support initiated when deficiency is identified.
Early pregnancy loss is distinguished from biochemical pregnancy (hCG-positive with no ultrasound confirmation) and from stillbirth (fetal loss at or after 20 weeks). Each category carries its own clinical framework. RRM does not collapse them.
Cited in this entry
- Hakim RB, Gray RH, Zacur H. Infertility and early pregnancy loss. https://rrmacademy.org/library/infertility-and-early-pregnancy-loss-recsskfk472egtil2/
- Kuroda K, Ikemoto Y, Horikawa T, et al. Novel approaches to the management of recurrent pregnancy loss: The OPTIMUM (OPtimization of Thyroid function, Thrombophilia, Immunity, and Uterine Milieu) treatment strategy. https://rrmacademy.org/library/novel-approaches-to-the-management-of-recurrent-pregnancy-loss-the-optimum-optim-recotwemmxon5hm20/
This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.