fetal development

fetal development

The growth and maturation of the fetus in utero. This is divided into three periods: the preembryonic period begins with conception and ends on gestational day 14; the embryonic period encompasses gestational weeks 3 through 8; and the remainder of the pregnancy is known as the fetal period. Body organs and systems arise from three primary germ layers (ectoderm, mesoderm, and endoderm) and rudimentary formation of all organ systems is completed by gestational week 16. Systems maturation essential to extrauterine survival begins during week 24 with the formation of pulmonary surfactant. Two critical events occur between weeks 26 and 29: the pulmonary vasculature becomes capable of gas exchange and the central nervous system becomes capable of controlling respiration.
Synonym: fetal maturation See: birth, preterm
References in periodicals archive ?
The study used in vitro fertilisation (IVF) on animals to determine the effects of paternal obesity on embryo implantation into the womb and fetal development.
Considering first fundamental principles in epigenetics, then nutritional status and specific nutrients, they cover epigenetic mechanisms, development epigenetics, epigenetic mechanisms in disease, maternal nutrition and fetal development, the role of specific nutrients, macronutrient intakes, environmental exposures, and the epidemiology of nutritional epigenetics.
The authors conclude that exposure to PBDEs is associated with lower TSH during pregnancy, which may have implications for maternal health and fetal development.
Pregnancy and birth sourcebook; basic consumer health information about pregnancy and fetal development, 3d ed.
Serotonin plays a pivotal role in assembling the brain's emotion circuitry, especially during fetal development.
Also let us know if you are looking for materials on abortion, pregnancy, or fetal development.
Medical abortions can be done only during the first 7 weeks of pregnancy The patient is given three mifepristone tablets; this drug blocks progesterone activity necessary for fetal development.
Let's make sure our clinics educate women about fetal development, the risks of abortion and how abortions are performed so they do not feel lied to and manipulated into an abortion they did not want.
of Nottingham, UK) bring together 18 chapters on the effects of nutrition on maternal health and fetal and neonatal development and identifying the nutritional requirements for each stage of fetal development and growth.
This compared with a rate of 6 pc among children who reached that stage of fetal development in December/January.
Never suggesting crime can be blamed on biology, this undergraduate textbook methodically surveys the results of recent studies on twins and adoption, hormones, fetal development, brain chemistry, structural brain imaging, diet, and toxins.