gestational age

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1. the duration, or the measure of time of the existence of a person or object.
2. to undergo change as a result of passage of time.
achievement age a measure of achievement expressed in terms of the chronologic age of a normal child showing the same degree of attainment.
chronologic age the actual measure of time elapsed since a person's birth.
developmental age
1. age estimated from the degree of anatomical development.
2. in psychology, the age of an individual determined by degree of emotional, mental, anatomical, and physiological maturation.
gestational age see gestational age.
mental age the age level of mental ability of a person as gauged by standard intelligence tests.


pertaining to gestation.
gestational age the estimated age or stage of maturity of a conceptus. Gestational age of the newborn infant can be estimated by noting various physical characteristics that normally appear at each stage of fetal development. Gestational age assessment of the newborn is facilitated by using a scoring system such as the one developed by Dubowitz and Dubowitz, or a modification of it by Ballard.

As the preterm newborn emerges from the birth canal it will be covered with a rather heavy coating of vernix caseosa; the full-term newborn has only a small amount of this cheeselike substance in body creases and the hair. By the 40th to 42nd week of gestation the skin of the newborn is pale and opaque, whereas the skin of the baby born before this period of gestation may be thin and transparent; venules can be seen under the skin on the abdomen.

At about 20 weeks the body is covered with fine hair called lanugo, which begins to disappear as maturation continues, first from the face, then the trunk, and finally from the extremities. At nine months gestation lanugo is usually seen only over the shoulders. Wrinkling of the soles of the feet is another indication of the newborn's gestational age. It occurs first near the toes and progresses toward the heels so that by the 40th week the entire sole is covered with creases. The preterm newborn will have smooth soles with only a few creases. “Cotton wool” hair that tends to stick together in small bunches so that it is difficult to distinguish one strand from another is common until the 38th week of gestation. This sign is of less significance in black infants. Cartilage of the ear can also be used to assess gestational age. Until about 32 or 33 weeks the pinnae stay folded when bent inward; by 36 weeks they spring back when released. At term they are firm enough to stand erect from the sides of the head.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ges·ta·tion·al age

1. in obstetrics, the developmental age of a fetus, usually based on the presumed first day of the last normal menstrual period.
2. in embryology, this term is superfluous because gestation does not begin until fertilization of an oocyte occurs around the middle of the menstrual cycle.
Farlex Partner Medical Dictionary © Farlex 2012

ges·ta·tion·al age

(jes-tā'shŭn-ăl āj)
The age of a fetus expressed in elapsed time since the first day of the last normal menstrual period.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Gestational age

The estimated age of a fetus expressed in weeks, calculated from the first day of the last normal menstrual period.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

ges·ta·tion·al age

(jes-tā'shŭn-ăl āj)
In obstetrics, developmental age of a fetus, usually based on presumed first day of last normal menstrual period.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
For gestational age at delivery no statistically significant association [at p = 0.05 level] with surrounding greenness was observed in either unadjusted or adjusted models.
Olesen [9] pointed out that the gestational ages estimated using ultrasound scanning were 2-3 days shorter than gestational ages estimated by the menstrual dates.
A confirmatory Cohort B was derived by matching for the following criteria: sex, year of birth, and gestational age.
The classification of stillbirths as SGA using INTERGROWTH-21st was performed by applying the <10th centile birth-weight cut-off at each gestational age.
CDC's National Immunization Survey is used for routine surveillance of breastfeeding initiation, duration, and exclusivity; however, this data source does not include gestational age. Overall rates of receipt of breast milk calculated from 2017 birth certificate data are comparable to breastfeeding initiation rates estimated from the survey data (83.2% among infants born in 2015).
Just over 50% were born preterm (gestational age 34-36 weeks), and there were more babies born preterm in the pre-gestational group compared with those with gestational DM (p=0.037).
Developmental outcome and follow up of the small for gestational age infants.
Neonatal Variables like neonate gender, gestational age, weight and maternal variables like age, parity, anemia, PIH, APH and UTI were used for analysis.
For the study, the team used blood samples collected during pregnancy to identify which genes gave reliable signals about gestational age and prematurity risk.
About 31 women were healthy volunteers whose mean gestational age was 30 weeks (range: 21 to 39 gestational weeks) and 17 were pregnant with fetuses diagnosed with CHD whose mean gestational age was 32 weeks.
The majority of the literature has focused on those born small for gestational age (SGA).