Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to gestation: culdoscope, Fetal development


the period of development of the young in viviparous animals, from the time of fertilization of the oocyte (ovum) to birth; see also pregnancy.
gestation period the duration of pregnancy; in the human female, the average length, calculated from the first day of the last normal menstrual period, is 280 days, or 6 lunar months. The normal limits of the human gestation period are from 37 weeks (259 days) to 42 weeks (293 days); days and weeks are counted as completed days and weeks. If one counts from the moment of conception, the length of time is 266 days (280−14 days).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.




The state of a female after conception and until the termination of the gestation.
[L. praegnans (praegnant-), pregnant, fr. prae, before, + gnascor, pp. natus, to be born]
Farlex Partner Medical Dictionary © Farlex 2012


The period of development in the uterus from conception until birth; pregnancy.

ges′ta·to′ry (jĕs′tə-tôr′ē), ges·ta′tion·al adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


Pregnancy Reproduction medicine The period from fertilization to delivery/birth. See Multiple gestation.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.


The state of a female after conception and until the termination of the gestation.
Synonym(s): gestation.
[L. praegnans (praegnant-), pregnant, fr. prae, before, + gnascor, pp. natus, to be born]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


the development of the embryo in the uterus of mammals. The gestation period is the time elapsing from fertilization and the implantation of the embryo to birth. This takes 60 days in the domestic cat, 9 months in humans and 18 months in the Indian elephant.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


The period from conception to birth, during which the developing fetus is carried in the uterus.
Mentioned in: Childbirth
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.


State of a female after conception and until termination of gestation.
[L. praegnans (praegnant-), pregnant, fr. prae, before, + gnascor, pp. natus, to be born]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about gestation

Q. Will she be tired all her pregnancy? My wife is 6 weeks pregnant with our first baby. She is tired all the time and goes to bed at 7 PM. Will she be like this the whole pregnancy?

A. Don't worry, this is very common! Here are some tips to help her with her tiredness:
-She should take short breaks during the day and lie down and lift her feet up. This can help her feel better and less tired. If she is at work and can't lie down, then she should just pick her legs up on a chair.
-She should take a few short naps during the day and sleep at least 7-8 hours a night.
- She should sleep on her left side as this improves the blood flow to the womb.

Q. Is this the symptom of pregnancy? I have burning rashes all over my face and neck and it is itching a lot. I’ve tried with popular brand lotions and all of them are in vain. I have consulted skin specialist also and he said this is not an allergic reaction. Can anyone give me some insight on this and what I could use to get rid of this crazy outbreak of rashes every now and then….. It’s just my skin got really sensitive for some reason... Is this the symptom of pregnancy?

A. I really doubt this. Morning sickness is one of the primary symptoms of pregnancy and you didn’t say anything about it. But developing rashes might be due to any skin deficiency for which you may have to consult a physician than forming your own conclusions. I don't know about the rash, but I broke out a lot during my first pregnancy. It's not a sure sign, but possible. My skin was itchy everywhere when I was pregnant. Every woman is different, some break out with bad acne when they get pregnant, and other's clear up. I broke out bad, but if you know your body, then it could be a sign!

Q. Which vaccinations are allowed during pregnancy? I'm 13 weeks pregnant and planning to travel to east Africa.

A. if you have to make some "vaccinations" to travel outbroad, you can also find out if a homeopathic vaccination exists. this will be okay for you and for sure.

Please check urgently the links on this page before you would like to go on with any vaccination, you should check out this very long list of links:

at the bottom you will also find links in english. vaccinations in general are very disputable/dubious and it is probably time that we learn about it.

More discussions about gestation
This content is provided by iMedix and is subject to iMedix Terms. The Questions and Answers are not endorsed or recommended and are made available by patients, not doctors.
References in periodicals archive ?
Pregnancies that continued till 40 to 41 weeks of gestation had an increased risk of 64 percent stillbirths as compared to deliveries that took place at 37 weeks of gestation period, the researchers found.
At sixty days of gestation, fetal sexing it was perform to obtain homogeneous treatments.
Biochemical maternal serum markers in second trimester (15th to 18th week of gestation) were obtained from 155 pregnant women with single pregnancy for hCG, AFP, Inh A and uE3.
Blood samples were collected from sows through jugular vein into serum separation tubes at d 110 of gestation as well as 24 h and 21 d postpartum and from nursing piglets through anterior vena cava at 24 h and 21 d after birth.
Fonseca, MD, reported in 2007 that asymptomatic women with a short cervix (defined as 15 mm or less) who were randomized to receive vaginal progesterone at a median of 22 weeks' gestation had a significantly lower rate of preterm birth before 34 weeks' gestation than those who received placebo (RR, 0.56; N Engl J Med.
Although hormonal treatments to increase gestation length have been previously described, only recently has the swine industry considered the use of progestagen supplementation to optimize routine husbandry and piglet care, reduce birth weight within-litter variation and prevent premature farrowing.
From January 1 to December 31, 2013, pregnant women were invited to participate if they had an uncomplicated singleton pregnancy between 18 and 41 weeks of gestation with normal fetal growth (the estimated fetal weight above the 10[sup]th percentile [sup][13]), accurate gestational age dating (based on the last menstrual period and confirmed with the first trimester ultrasound), and without evidence of a structural defect on ultrasound.
* A single course of corticosteroids "may be considered for pregnant women starting at 23 0/7 weeks of gestation who are at risk of preterm delivery within 7 days."
Stillbirth is mainly attributed to placental insufficiency and foetal growth restriction.9 Twin-to-twin transfusion syndrome (TTTS) is one of the most serious complications of the monochorionic multiple gestation. The onset of TTTS is usually during the second trimester and the majority of deaths occur before 24 weeks of gestation.10,11 Other contributing factors include congenital anomalies, advancing maternal age and medical obstetric condition like hypertension and diabetes.9
The detection rates of different types of ectopic gestation and different sizes of mass using transabdominal sonography in combination of transvaginal sonography were higher than that of transabdominal sonography and transvaginal sonography (P<0.
Among the 236 pre-term births within the study group, women who continued their marijuana use up to 20 weeks of gestation experienced shorter gestations --less than 30 weeks on average--than women who did not use marijuana.