IVF Side Effects and Risks: From Ovarian Stimulation to Pregnancy

In vitro fertilization (IVF) is generally safe but carries specific risks. Understanding them enables informed consent.

1. Ovarian Hyperstimulation Syndrome (OHSS)

• Ovaries over-respond to gonadotropins → massive enlargement, capillary leak → ascites, pleural effusion, hemoconcentration, thrombosis risk.
• Mild (33%): bloating, mild pain. Moderate (5%): ascites, nausea. Severe (1%): hemodynamic instability, ARDS, renal failure.
• Prevention: GnRH antagonist protocol, GnRH agonist trigger, freeze-all strategy, cabergoline.

2. Multiple Pregnancy

• Transferring >1 embryo → twins/triplets. Risks: preterm birth, low birth weight, preeclampsia, GDM, NICU admission, cerebral palsy.
• Current standard: elective single embryo transfer (eSET) for most patients.

3. Ectopic Pregnancy

• 2–5% of IVF pregnancies (vs. 1–2% natural). Risk factors: tubal damage, endometriosis. Requires urgent treatment (methotrexate/surgery).

4. Birth Defects

• Baseline risk ~3–4%. IVF/ICSI associated with ~1.2–1.5x relative risk (absolute ~4–5%). Contributing factors: parental infertility, advanced age, culture media, epigenetic changes.
• Preimplantation genetic testing (PGT-A) reduces aneuploidy but not all defects.

5. Emotional and Financial Burden

• Cycle failure, uncertainty, hormonal mood swings, relationship strain. Counseling/support groups help.
• Cost: $15k–$30k+/cycle (US); often limited insurance coverage.

6. Procedural Risks

• Egg retrieval: bleeding, infection, organ injury (rare).
• Anesthesia: standard risks.
• Infection post-transfer: <1%.

Long-Term Outcomes

No convincing evidence IVF increases maternal cancer risk. Children conceived via IVF are healthy overall; subtle metabolic/vascular differences are under study.

Discuss personalized risk-benefit with your REI (reproductive endocrinologist).