Pregnancy due date calculator
Estimated due date and current gestational age from the first day of your last menstrual period (LMP). Your midwife confirms the date at the dating scan — this is the at-home estimate.
What to do in early pregnancy
- Folic acid 400 mcg daily — from before conception through to 12 weeks (higher 5 mg dose for some — diabetes, previous neural-tube defect, certain medicines).
- Vitamin D 10 mcg daily — throughout pregnancy.
- Book with your GP / midwife for booking appointment (usually 8-10 weeks).
- Tell us what you're already taking — many common OTC medicines aren't recommended in pregnancy. We'll review your current medicines for free.
Medicines in pregnancy — quick reference
- Paracetamol — generally safe at standard doses across all trimesters.
- Ibuprofen and other NSAIDs — avoid, particularly from 30 weeks onwards.
- Codeine — not first-line in pregnancy; ask before taking.
- Antihistamines — loratadine and cetirizine are generally preferred; ask first.
- Decongestants (pseudoephedrine) — avoid in pregnancy.
- Antacids — Gaviscon is generally safe; long-term use should be discussed.
- Anything you're not sure about — call or pop in. We have time to look.
UTI in pregnancy
Urinary infections in pregnancy need same-day attention. We run the NHS Pharmacy First UTI pathway for women 16-64 — but in pregnancy, the pharmacist will likely refer you for GP review rather than treat directly, because antibiotic choices in pregnancy are narrower. Either way, please don't wait it out — call 0113 244 1551.