🌻Fertility Calculator

NHS Guidance on Getting Pregnant

The NHS recommends having sex every 2–3 days throughout your cycle to maximize your chances of conception. While knowing your fertile window can help, the NHS notes that timing intercourse too precisely can add stress. Most couples who have regular sex (every 2–3 days) and don't use contraception will conceive within a year.

NHS – Trying to Get Pregnant

NICE Guidelines on Fertility

The National Institute for Health and Care Excellence (NICE) recommends that women trying to conceive should take 400 micrograms of folic acid daily until 12 weeks of pregnancy. NICE also advises that couples who haven't conceived after 1 year of regular unprotected sex (or 6 months if the woman is over 36) should seek medical advice.

NICE – Fertility Problems: Assessment and Treatment

RCOG Advice on Ovulation

The Royal College of Obstetricians and Gynaecologists (RCOG) states that ovulation typically occurs 10–16 days before your next period starts. Signs of ovulation may include mild pelvic pain, changes in cervical mucus (becoming clearer and more stretchy), and a slight rise in basal body temperature. Ovulation predictor kits can detect the LH surge that occurs 24–36 hours before ovulation.

Royal College of Obstetricians and Gynaecologists (RCOG) – Fertility Information

🌸 Ovulation

Typically occurs 12-16 days before your next period, regardless of cycle length.

⏰ Fertile Window

The 6-day period ending on ovulation day when conception is possible.

💯 Best Timing

Intercourse 1-2 days before ovulation gives the highest conception chances.

When should I see my GP about fertility in the UK?

According to NHS guidelines, you should see your GP if you haven't conceived after 1 year of trying (or 6 months if you're 36 or over). You should also seek advice sooner if you have irregular periods, a history of pelvic inflammatory disease, or previous cancer treatment. Your GP can arrange initial tests and refer you to a fertility specialist if needed.

Is NHS fertility treatment available and what does it cover?

NHS fertility treatment, including IVF, is available but eligibility criteria vary by Clinical Commissioning Group (CCG) area. NICE recommends 3 full cycles of IVF for eligible women under 40, but local funding policies differ. Some areas have age limits, BMI requirements, or restrictions based on existing children. Check with your local CCG for specific criteria in your area.

How reliable are ovulation predictor kits available in the UK?

Ovulation predictor kits (OPKs), widely available in UK pharmacies, detect the luteinising hormone (LH) surge that occurs 24–36 hours before ovulation. According to NHS guidance, these kits are over 99% accurate at detecting the LH surge. However, they indicate that ovulation is approaching—not that it has definitely occurred. Combining OPKs with cycle tracking improves accuracy.