Decreasing prematurity in twin gestations: predicaments and possibilities

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Reproductive Endocrinology

Background:

• The twin birth rate has significantly increased, largely due to assisted reproductive technologies.
• Despite progress in singleton preterm birth prevention, the overall preterm birth rate has seen minimal decline.
• Existing interventions for preventing preterm birth in twins have largely been ineffective.

Discussion:

• Inpatient bed rest is not effective and poses risks for maternal morbidity.
• Intramuscular 17α-hydroxyprogesterone caproate and cerclage are ineffective for preventing preterm birth in twin gestations, even with a short cervix.
• Emerging evidence suggests vaginal progesterone and the Arabin cervical pessary may reduce preterm birth in twins with a short cervix.

Key Insights:

• No current interventions are reliably effective in preventing preterm birth in twin pregnancies.
• Vaginal progesterone and cervical pessaries show potential benefit for a specific subgroup of twin pregnancies (those with a short cervix).
• Further research is critical to validate these promising findings.

Outlook:

• Large-scale, multicenter trials are necessary to definitively assess the efficacy of vaginal progesterone and cervical pessaries in twin gestations.
• Investigating novel therapeutic strategies for preterm birth prevention in twins remains a critical area of research.
• Improving outcomes for twin pregnancies requires targeted interventions and robust clinical evidence.