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 most common explanation about the presence of nipples in every person can be found during fetal development. While in the mother's womb, males and females start from the same genetic base.A
Tenders are invited for Delivery of reagents and consumables for scientific research in the Bulgarian-American project "Genetic and epigenetic studies of the fetal development of the human brain" in 3 detached positions
Pregnancy and Birth Sourcebook: Basic Consumer Health Information About Pregnancy and Fetal Development..., 4th Edition
A recent study shows that maternal exercise is important for fetal development in obese mothers.
The poster describes the results of pre-clinical studies designed to assess the impact of SCY-078 on reproductive potential, mating behavior, and embryonic and fetal development. At doses greater than the efficacious clinical exposure, sexual function, maturation of gametes, estrous cycles, pregnancy rates and implantation were comparable to vehicle control; rats and rabbits receiving oral SCY-078 showed no enhanced toxicities relative to those noted in studies conducted with non-pregnant females, there was no increase in embryo-fetal loss, and evaluations of fetal development revealed no SCY-078-related anomalies in the rats or rabbits.
Semaphorin is normally only active in the fetal development state, where it destroys some 50% of unnecessary axons, which connect nerve cells to one another.
From understanding scientifically that life begins from the moment of conception, to knowing fetal development, to understanding fetal pain, here is truth that is open to any mind not already closed tight.
A team led by Sean Morrison, professor of pediatrics, has identified an RNA-binding protein called IMP1 that promotes stem cell self-renewal during fetal development. Self-renewal is the process by which stem cells divide to make more stem cells, which is important for the growth of tissues during fetal development and the regeneration of tissues throughout adult life.
Given the high risk of preterm birth, steroids administered earlier would have improved fetal development. Cesarean delivery should have been performed.
Also, in the fasting mother, changes can be observed in the fetal development due low weight gain and calorie intake.
A tooth whitening paste imported from the Netherlands has been removed from the market as it contains Sodium Perborate, which meets EU criteria as toxic and can affect fertility and fetal development, the health services said.
This remains the only book for parents that cover the basics of how to identify a possible B12 deficiency from fetal development through adolescence, and discusses intervention techniques and treatments while emphasizing techniques for working with doctors.