What if I'm allergic to doxycycline?
Tell your clinic immediately. Alternatives exist (fluoroquinolones, cephalosporins, macrolides). There is almost always a suitable antibiotic.
IVF & ICSI Treatment
Antibiotics During IVF: Why You're Taking Them and What to Watch For
Many IVF clinics prescribe antibiotics to one or both partners around egg retrieval — standard infection prevention, not paranoia. Here's why, which are used, and the side effects to watch for.
Why Antibiotics During IVF?
Egg retrieval involves a needle passing through the vagina and into the ovary. Despite sterile technique, there's a small risk (~1–2%) of infection. Antibiotics reduce this risk to near-zero. Also, infected semen can damage sperm quality and reduce fertilisation rates. Prophylactic antibiotics (preventive, not treating existing infection) may be recommended to the male partner.
Which Antibiotics?
Standard protocols use:
- - The woman is injected intravenously with a single dose of cephalosporin or equivalent antibiotic around the time of the egg retreival.
- - If there is a history of reproductive tract infections in either partner, Doxycycline is also prescribedto both partners starting 2–3 days before retrieval, continuing for 5–7 days. Dose: 100mg twice daily. Cephalosporin (like cephalexin): alternative if doxycycline allergy; 500mg 3–4 times daily.
- - Women who have an egg retreival where the bowel is accidentally punctured or in the presence of an endometriotic cyst are prescribed additional antibiotics as per the clinical situation.
These are broad-spectrum, meaning they cover many bacteria. They're well-tolerated and serious side effects are rare.
How to Take Doxycycline Safely
- - Take with full glass of water, sitting upright for 30 minutes (prevents irritation of the oesophagus)
- - Take on an empty stomach or with non-dairy food (dairy interferes with absorption)
- - Take at the same times each day (consistent levels)
- - Complete the full course even if you feel fine (incomplete courses create resistant bacteria)
Common Side Effects (Mostly Mild)
- - Nausea or mild GI upset: take with bland food if needed, not dairy
- - Photosensitivity: doxycycline makes skin more sun-sensitive; use SPF 30+ sunscreen
- - Mild dizziness or headache: usually self-limited
When to Contact Your Clinic During Antibiotics
- - Severe nausea or vomiting (can't complete course)
- - Rash or hives (possible allergic reaction)
- - Severe abdominal pain or bloody diarrhoea (rare but serious)
- - Signs of yeast infection (severe itching, thick white discharge)
Antibiotics and Pregnancy
If you become pregnant during the antibiotic course (rare), doxycycline use in early pregnancy is low-risk but tell your obstetrician. Safer alternatives exist if pregnancy is confirmed mid-course.
Q: What if I'm allergic to doxycycline?
A: Tell your clinic immediately. Alternatives exist (fluoroquinolones, cephalosporins, macrolides). There is almost always a suitable antibiotic.
Q: Do antibiotics reduce IVF success rates?
A: No. Antibiotics don't harm egg quality, sperm quality, or embryo development. They reduce infection risk only. Sometimes, a coincidental infection such as a urinary tract infection or respiratory infection may also need treatment with antibiotics. These can usually be safely taken without any effect on success rates or pregnancy outcomes.
Frequently Asked Questions
Do antibiotics reduce IVF success rates?
No. Antibiotics don't harm egg quality, sperm quality, or embryo development. They reduce infection risk only. Sometimes, a coincidental infection such as a urinary tract infection or respiratory infection may also need treatment with antibiotics. These can usually be safely taken without any effect on success rates or pregnancy outcomes.
