🤰 Pregnancy Calculator

Pregnancy Term & Due Date

Pregnancy is a term used to describe a woman’s state over a period of approximately nine months during which one or more offspring develop inside the womb. Childbirth usually occurs around 38 weeks after conception, or roughly 40 weeks after the last menstrual period (LMP). The World Health Organization (WHO) defines a normal pregnancy as lasting between 37 and 42 weeks.

During a person’s first OB-GYN visit, doctors often provide an estimated due date based on a sonogram or the date of the last menstrual period. However, this is only an estimate — various factors such as age, prior pregnancies, and maternal weight can influence the actual term.

Studies show that fewer than 4% of births occur exactly on the due date, about 60% occur within a week, and nearly 90% occur within two weeks. Therefore, while a due date provides a useful guideline, the exact day of birth cannot be predicted with certainty.

Pregnancy Detection

Pregnancy can be detected either through tests or by observing physical symptoms such as a missed period, fatigue, nausea, or frequent urination. Clinical blood and urine tests detect specific pregnancy hormones (like hCG) as early as 6–8 days after fertilization.

Blood tests are more accurate and can measure exact hormone levels, though they are more costly and slower than home urine tests. Clinical urine tests are also available, but their accuracy is similar to home testing kits.

Pregnancy Management

Managing pregnancy involves monitoring multiple factors such as medication use, weight gain, exercise, and nutrition, each of which plays a vital role in fetal health and the mother’s well-being.

Medication

Some medications can affect fetal development. In the U.S., the FDA classifies drugs from categories A to X based on their risk-to-benefit ratio during pregnancy. Expectant mothers should always consult their doctor before taking any medication.

Weight Gain

Weight gain is natural and essential during pregnancy. It supports the baby, placenta, and maternal nutrient stores. However, both insufficient and excessive gain can pose health risks.

• Underweight (BMI < 18.5): 28–40 lbs
• Normal (BMI 18.5–24.9): 25–35 lbs
• Overweight (BMI 25–29.9): 15–25 lbs
• Obese (BMI ≥ 30): 11–20 lbs

These guidelines come from the Institute of Medicine and help maintain healthy fetal growth and reduce complications like gestational hypertension or C-sections.

Exercise

Regular aerobic and strength training during pregnancy can improve stamina and reduce the risk of complications. According to the American College of Obstetricians and Gynecologists, women who exercised before pregnancy can often continue safely unless advised otherwise.

However, if symptoms like bleeding, dizziness, chest pain, or contractions occur, exercise should be stopped and medical advice sought immediately.

Nutrition

Proper nutrition is vital for both mother and baby. Pregnant women need extra calories and nutrients, including:

• Folic Acid (Vitamin B9): Reduces risk of birth defects.
• DHA Omega-3: Supports brain and eye development.
• Iron, Calcium, and Protein: Essential for healthy growth and energy.

Since every pregnancy is unique, consulting a doctor or nutritionist ensures personalized care and safety.