How is the pregnancy due date calculated?

Most obstetricians use Naegele's Rule: add 280 days (40 weeks) to the first day of your last menstrual period (LMP). Our calculator adjusts that by your cycle length — if your cycle is longer than 28 days, ovulation happens later, so the due date shifts accordingly.

How accurate is a due date calculator?

When the LMP is known, the estimated due date is typically accurate within ±7 days. Only about 5% of babies are actually born on the calculated date. A first-trimester ultrasound (between 8 and 13 weeks) gives the most precise dating.

What if my cycle is irregular?

For irregular cycles, we add the difference between your cycle length and the standard 28 days. For example, with a 32-day cycle, we add 4 extra days. If your cycles are highly irregular, an early dating ultrasound at Vinayaka Hospital is the most reliable option.

Can I calculate my due date from the conception date?

Yes. If you know the conception date (often the ovulation day), the estimated due date is conception + 266 days. Choose 'Conception Date' in the calculator and we'll handle the math for you.

How do I find my pregnancy week?

Pregnancy week = (Today − LMP) ÷ 7. So if your LMP was 10 weeks ago, you're 10 weeks pregnant — even though conception happened around 8 weeks ago. This is the convention used by every obstetric guideline worldwide.

When does each trimester start and end?

First trimester: week 1 to 12. Second trimester: week 13 to 27. Third trimester: week 28 to 40. Babies born between 37 and 42 weeks are considered full-term.

Is a 9-month or 10-month pregnancy correct?

Pregnancy is roughly 9 calendar months, but obstetrically it's 40 weeks (or 10 lunar months of 28 days each). Both are correct — they just measure time differently.

When should I book my first appointment at Vinayaka Hospital?

Ideally between week 6 and week 8. We perform a dating ultrasound, confirm viability and start your antenatal care plan. You can book online, call +91 99809 55836 or WhatsApp us anytime.

Does Vinayaka Hospital offer painless delivery?

Yes. We offer 24×7 epidural analgesia, water birth and natural birthing rooms with experienced obstetricians and anaesthetists on-site at our BTM 4th Stage facility.

Will the calculator store my personal data?

No. All calculations run locally in your browser. We do not store, transmit or sell your information — your privacy is paramount.

Vaccinations Every Woman Should Know About | Vinayaka Hospital, Bengaluru

Vaccination is not just something we think about for children. As a woman, certain vaccines matter at very specific points in your life — before you plan a pregnancy, during pregnancy, and at different ages as you go about your everyday life. Many of these are missed simply because nobody explained why they matter or when to take them.

Dr. Jaya Subrahmanyam of Vinayaka Hospital, Arekere, Bengaluru, walks through the vaccinations every woman should be aware of, and how they protect you at every stage of life.

1. HPV Vaccine

The Human Papillomavirus (HPV) vaccine protects against the strains of HPV responsible for the vast majority of cervical cancer cases, along with other HPV-related cancers.

Helps prevent cervical cancer, one of the most common cancers among Indian women
Recommended for adolescents and young women, ideally between the ages of 9 and 26
Most effective when given before any exposure to HPV, which is why early vaccination matters

Even women who have already been sexually active can benefit from the vaccine, so it is worth discussing with your Gynaecologist regardless of your age or history.

2. Tetanus (Td/Tdap)

The tetanus vaccine, given as Td or Tdap, is one of the most important vaccinations during pregnancy.

Important during pregnancy, typically given in the second or third trimester
Protects both mother and baby from tetanus infection around the time of delivery
Reduces the risk of newborn (neonatal) tetanus significantly

This is a standard part of antenatal care and is given as a routine part of your pregnancy check-ups at Vinayaka Hospital.

3. Influenza Vaccine

The flu vaccine is often overlooked by adults, but it is particularly important for women, including those who are pregnant.

Recommended every year, as flu strains change each season
Safe during pregnancy, at any trimester
Helps prevent severe flu complications, which can be more serious during pregnancy

4. Rubella (MMR)

Rubella infection during early pregnancy can cause serious birth defects, which is why immunity to rubella matters before you conceive.

Best taken before pregnancy, ideally with a gap of at least one month before conceiving
Prevents congenital rubella syndrome, a serious condition affecting the baby
Consult your Gynaecologist before planning pregnancy to check your rubella immunity status

5. Hepatitis B Vaccine

Hepatitis B is a viral infection that affects the liver and can become chronic if left unaddressed.

Protects the liver from long-term damage caused by chronic infection
Recommended for women at risk, including healthcare workers and those with certain lifestyle or family risk factors
Safe and highly effective, with long-lasting protection

6. COVID-19 Vaccine

COVID-19 vaccination guidance continues to evolve, and it remains a relevant consideration for women's health.

Recommended according to current medical guidelines applicable to your age and health status
Helps reduce the risk of severe illness
Ask your doctor about booster doses based on your individual risk factors

Frequently Asked Questions

Which vaccines should I take before planning a pregnancy?

Rubella (MMR) immunity should be confirmed before conception, and any other pending vaccinations should ideally be completed before you start trying to conceive. Discuss your vaccination history with your Gynaecologist during preconception counselling.

Are vaccines safe during pregnancy?

Certain vaccines, such as Tdap and the influenza vaccine, are specifically recommended during pregnancy because they protect both mother and baby. Others, like MMR, are avoided during pregnancy and should be taken beforehand. Always follow your Gynaecologist's guidance on timing.

I am not sure which vaccines I have already taken. What should I do?

Bring any vaccination records you have to your next appointment. If records are unavailable, your doctor can guide you on which vaccines or tests are appropriate based on your age, history, and current health.

Book Your Consultation

Not sure which vaccines you need? Consult the Gynaecology Department at Vinayaka Hospital to know which vaccines are right for you, at every stage of life.

Dr. Jaya Subrahmanyam
Senior Gynaecologist & Obstetrician
25+ Years of Experience

Vinayaka Hospital
Sir M. Visvesvaraya Road, Arekere
Bengaluru, Karnataka 560076

Vaccinations Every Woman Should Know About