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Pregnancy has been divided into three stages traditionally. First, second and third Trimester. It takes 10 LUNAR months for delivery after last menstrual period. Conception usually occurs on day 14 of menses and so called period of Organogenesis(When most of the organs of the embryo develops is from day 18 to day 56.) Before day 18 usually abortion will occur.( If embryo is abnormal usually miscarriage will occur and in study of Embryo in first trimester shown that most of them have Genetic abnormality.) So your Doctor takes all precautions in this period. Artificial colors, flavors and preservatives to be avoided, specially in developing countries. Then you have second trimester in witch Ultrasonography will show any Fetal abnormality and pregnancy can be safely terminated. Then you have third trimester to go. It takes 10 LUNAR months for L.M.P.(Last menstrual period.) to E.D.D.( Expected Date of Delivery.)( Incidentally menstrual cycle is also of one LUNAR month.)So be in touch with your Gynecologist and have faith in GOD !

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11y ago
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15y ago

1st trimester: 0-12 weeks (so 12 weeks) 2nd trimester: 13-28 weeks (so 15 weeks) 3rd trimester: 29-40 weeks (so 11 weeks)

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10y ago

An estimate of 3 months each stage.

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Q: How long is each 3 stages of pregnancy?
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