Yes — pregnancy with fibroids is possible for most women. The fertility impact depends on fibroid type and location. Submucosal fibroids (inside the cavity) have the greatest negative effect and should generally be removed before conception. Subserosal fibroids rarely affect fertility. Specialist assessment determines whether treatment is needed.
Introduction
Being told you have fibroids when you are trying to conceive can feel alarming. The reality is more nuanced: millions of women with fibroids conceive and carry healthy pregnancies without any intervention. The question that matters is not whether you have fibroids, but which type, where they are, and whether they are touching the uterine cavity. This article focuses specifically on the fibroids-fertility-pregnancy relationship. For the complete guide to trying to conceive with fibroids, see Trying to Conceive with Fibroids.
The Submucosal Fibroid: The One That Matters Most
Submucosal fibroids project into the uterine cavity. Even a 1–2cm submucosal fibroid can impair implantation more significantly than a much larger intramural fibroid that does not reach the cavity. The mechanism involves:
- Physical disruption of the endometrial surface where the embryo implants
- Altered local blood flow to the adjacent endometrium
- Biochemical changes in the uterine environment
- Abnormal uterine contractions
Studies show submucosal fibroids reduce natural conception rates, IVF implantation rates, and increase miscarriage risk. Hysteroscopic removal is highly effective and significantly improves outcomes.
Intramural Fibroids: Depends on the Cavity
Intramural fibroids within the uterine wall have a more nuanced impact:
- Cavity-distorting intramural fibroids: functionally similar to submucosal fibroids — removal generally recommended
- Non-cavity-distorting intramural fibroids under 4cm: limited effect on fertility — usually observed
- Large non-cavity intramural fibroids (above 4–5cm): may modestly reduce IVF success — individualised decision
Subserosal Fibroids: Usually Not a Problem
Subserosal fibroids sit on the outer surface of the uterus and do not typically affect the uterine cavity or fertility. Unless very large (causing mechanical symptoms or distorting pelvic anatomy), they generally do not require treatment for fertility purposes.
Fibroids and Pregnancy: What to Expect
First Trimester
Fibroids may grow in early pregnancy due to elevated oestrogen and progesterone. Some women experience “red degeneration” — a painful episode as a rapidly growing fibroid outgrows its blood supply. This is self-limiting but may require hospitalisation. Most pregnancies progress normally.
Second and Third Trimester
Fibroids rarely cause significant complications in the second and third trimesters. Large fibroids may contribute to:
- Preterm labour (if they distort the uterine cavity)
- Abnormal fetal position (breech, transverse)
- Placenta praevia (rare — if the fibroid is near the cervix)
Delivery
Fibroids near the cervix can obstruct labour. Previous myomectomy (particularly open/laparoscopic) typically requires caesarean section delivery to protect the uterine scar. Hysteroscopic myomectomy does not require caesarean.
When Is Myomectomy Recommended?
- Submucosal fibroids of any size — before trying to conceive or before IVF
- Intramural fibroids distorting the uterine cavity
- Recurrent miscarriage in the context of submucosal or cavity-adjacent fibroids
- Recurrent IVF implantation failure with uterine cavity fibroids identified
- Large intramural fibroids (above 5cm) — individualised decision with specialist
IVF and Fibroids
IVF can be very successful in women with fibroids when the uterine cavity is clear. Cavity assessment (saline sonohysterogram or hysteroscopy) before IVF is essential. Any cavity-distorting fibroids should be removed before embryo transfer. The IVF in South Africa complete guide covers everything you need to know about the IVF process and costs.
Related Articles
- Trying to Conceive with Fibroids
- IVF in South Africa: Complete Guide
- Uterine Polyps and Fertility Treatment
- Uterine Polyps and IVF
- Trying to Conceive with Adenomyosis
- Adenomyosis and IVF
- Medical Aid Coverage for Fertility Treatment
- NHS Fibroids Overview
Frequently Asked Questions
Can I conceive naturally with a large fibroid?
Depends on the location. A large subserosal fibroid is unlikely to impair natural conception. A large submucosal or cavity-distorting intramural fibroid significantly reduces conception chances and should be treated.
How do I know if my fibroid is inside the uterine cavity?
A transvaginal ultrasound gives an initial assessment. A saline sonohysterogram or hysteroscopy provides definitive information about cavity involvement.
Does fibroid removal guarantee pregnancy?
No — myomectomy removes a specific obstacle to pregnancy but does not address other fertility factors (ovarian reserve, partner’s sperm, tubal status). A full fertility assessment should be done alongside fibroid assessment.
Will fibroids come back after myomectomy?
Fibroids can recur after myomectomy — rates vary by surgical technique and patient factors. Most women who conceive shortly after myomectomy do so before significant regrowth occurs.
Can I do IVF without removing my fibroids?
For fibroids not touching the cavity, IVF can proceed without removal. For cavity-distorting fibroids, removal before IVF is strongly recommended as it significantly improves implantation rates.
Is myomectomy covered by South African medical aid?
Yes — myomectomy for fibroids causing infertility or significant symptoms is typically covered under PMB codes. Check your specific plan and request pre-authorisation.
How long does hysteroscopic fibroid removal take?
The procedure takes 30–60 minutes. It is a day procedure. Most women return to normal activities within 2–3 days.
Can fibroids cause anaemia affecting fertility?
Heavy menstrual bleeding from fibroids can cause iron-deficiency anaemia. Correcting anaemia before fertility treatment or surgery is important. Iron supplementation and, in severe cases, medical treatment to control bleeding may be recommended.
What type of fibroid removal is safest for future fertility?
Hysteroscopic myomectomy (for submucosal fibroids) has the best fertility outcomes and least uterine scarring. Laparoscopic myomectomy is preferred over open surgery for intramural fibroids. Open myomectomy requires caesarean section in future pregnancy.
Where do I start if I have fibroids and want to get pregnant?
Book a consultation with a gynaecologist or fertility specialist for a pelvic ultrasound and cavity assessment. Fertility Solutions connects you with experienced specialists across South Africa.
Key Takeaways
- Most women with fibroids can conceive — location is everything
- Submucosal fibroids have the greatest impact and should generally be removed before conception
- Hysteroscopic myomectomy is highly effective with minimal recovery
- IVF with fibroids is successful when the cavity is clear
- Full fertility assessment alongside fibroid assessment gives the clearest picture
Closing Thoughts
Fibroids do not have to stand between you and pregnancy. With the right assessment and targeted treatment where needed, most South African women with fibroids go on to have healthy pregnancies. Find a fertility specialist who can assess your individual fibroid situation through Fertility Solutions.
Disclaimer: This content is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making decisions about fertility treatment.
About the Author
Leigh-Ann Geydien is the founder of Fertility Solutions, South Africa’s only dedicated fertility directory. With a deep commitment to patient advocacy, she built the platform to bridge the gap between those navigating fertility challenges and the clinics and reproductive health specialists best placed to help them.
