Pregnancy Term & Due Date

One or more embryos grow within a woman for around nine months, a period known as pregnancy. The average time from conception to delivery is 40 weeks. Normal gestation lasts from 37 to 42 weeks, according to the World Health Organization. The OB-GYN will typically give the patient an approximate due date (based on a sonogram) during the first prenatal appointment. The latest menstrual cycle may also be used as a proxy for the expected due date.

Although the due date may be roughly calculated, the actual duration of pregnancy is affected by variables such as the mother's age, the number of pregnancies she has had, and her birth weight.

1 However, there are also more elements not fully understood that contribute to natural variance in pregnancy terms. Fewer than 4% of births actually occur on the expected day, yet 60% occur within a week of the expected date, and approximately 90% occur within two weeks of the expected date, according to studies. 2 Consequently, although it is presently not able to predict the precise day of birth with confidence, it is possible to be pretty certain that a person's kid will be delivered within roughly two weeks of the due date.

Diagnosis of Pregnancy

A missing menstrual cycle, a higher-than-usual basal body temperature, exhaustion, nausea, and an increased need to urinate are just few of the signs that might indicate pregnancy, which can be picked up by a home pregnancy test or by the woman herself.

Clinical blood or urine tests may identify pregnancy as early as six to eight days after fertilisation via the identification of hormones that act as biomarkers for pregnancy. Clinical blood tests are superior than home pregnancy urine tests because they can identify precise concentrations of the hormone hCG (which is only present during pregnancy) sooner and in lower quantities, but they are also more time-consuming and costly to analyse. Clinical urine tests are also available, although they may be more expensive and are not always more reliable than at-home tests for determining pregnancy.

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Controlling a Pregnancy

Medication, weight growth, exercise, and diet are just few of the numerous individualised considerations that must be made throughout pregnancy.


The effects of certain drugs used during pregnancy might be irreversible on the developing baby. The Food and Drug Administration (FDA) assigns medications in the United States to one of five categories (A, B, C, D, and X) depending on the balance of their expected benefits and hazards to an unborn child. Category A medications are those that have been shown to have favourable effects for the mother while posing little danger to the foetus, while category X drugs are those whose known, substantial hazards to the foetus exceed any possible advantages to the mother. Prior to taking any medicine during pregnancy, a woman should talk to her doctor.

Accumulation of extra poundage:

Pregnancy weight increase is a normal and common occurrence, however it differs from woman to woman. It has a wide range of effects on the developing foetus, including on the baby's weight, the placenta, the amount of excess circulatory fluid, and the foetal fat and protein storage. Consequences for mother and child, such as the requirement for a caesarean section (C-section) and gestational hypertension, are all reasons to give weight management some thought throughout pregnancy. Overall, the Institute of Medicine advises a weight increase of 25–35 pounds for women with a "normal" body mass index (BMI) of 18.5-24.9, 28–40 pounds for women with a BMI of 18.5 or less, 15–25 pounds for women with a BMI of 25–29.99, and 11–20 pounds for women with a BMI of 30 or more. 3 The Institute of Medicine has provided the foundation for our Pregnancy Weight Gain Calculator.


Aerobic activity during pregnancy has been shown to enhance fitness levels, keep them steady, and reduce the likelihood of a caesarean delivery. Pregnant women are typically encouraged to maintain their usual exercise routines, which may include aerobic and strength-conditioning activities. This is especially true for women who exercised regularly before to pregnancy and who are expecting a healthy baby. 4 According to the American College of Obstetricians and Gynecologists, foetal damage from exercise are very improbable in the case of a normal pregnancy. However, a pregnant woman should exercise care and see a doctor if she has any of the following symptoms: vaginal bleeding, difficulty breathing, dizziness, headache, calf discomfort or swelling, amniotic fluid leaks, reduced foetal activity, preterm labour, muscular weakness, or chest pain.5


Prenatal nutrition is crucial to the well-being of both mother and child. Since pregnant women need more calories and some micronutrients, their dietary needs change from those of a healthy adult. 6

Other nutrients, such as DHA omega-3, necessary for proper brain and retinal development, cannot be produced efficiently by infants and must be obtained through the placenta during pregnancy or in breast milk after birth. Vitamin B9, also known as folic acid, can help reduce the risk of certain defects. There is a wealth of information available to pregnant women on what is safe and unhealthy for them to eat and do, and several studies have shown that certain micronutrients play an important role in foetal growth. Individuals may have varied needs and approaches while sifting through the data. Women who are expecting should talk to their physicians and/or a dietician to figure out what's best for them.