Uterine Leiomyomas and Reproduction.

Area of Science:

• Reproductive Medicine
• Gynecology
• Obstetrics

Background:

• Prevailing gynecological opinion suggests uterine leiomyomas (fibroids) negatively impact pregnancy outcomes.
• This dogma is increasingly challenged by newer data, necessitating a re-evaluation of fibroid effects on reproduction.
• Existing research on fibroids and reproductive outcomes, including surgical interventions, requires comprehensive analysis.

Purpose of the Study:

• To critically analyze existing data on the correlation between uterine leiomyomas and pregnancy/delivery outcomes.
• To address key questions regarding the role of fibroids in pregnancy and delivery, challenging established assumptions.
• To evaluate the impact of myomectomy on subsequent pregnancy and delivery complications.

Main Methods:

• A thorough literature search was conducted to gather relevant studies.
• Data from multiple sources were systematically analyzed to address specific queries.
• Focus on comparing outcomes in women with and without uterine leiomyomas, and with and without myomectomy.

Main Results:

• Uterine leiomyomas tend to decrease in size during late pregnancy and postpartum.
• Spontaneous abortion rates are comparable between women with and without fibroids.
• Conflicting data exist for preterm prelabor rupture of membranes, placental abruption, cesarean delivery, and postpartum hemorrhage, but best evidence shows no significant correlation with fibroids.
• Preterm delivery rates are elevated in women with fibroids.
• Myomectomy does not reduce preterm deliveries and may increase this risk.
• Women who undergo myomectomy show increased rates of elective cesarean delivery and greater blood loss during delivery compared to women with fibroids in situ.

Conclusions:

• The detrimental impact of uterine leiomyomas on pregnancy is often overstated, with similar spontaneous abortion rates observed.
• While some delivery complications show conflicting data, significant correlations with fibroids are not consistently supported by the best evidence.
• Elevated preterm delivery risk is associated with fibroids, and myomectomy may exacerbate this, alongside increased cesarean delivery rates and blood loss.