embryological development

embryological development

[-loj′ik]
the various intrauterine stages and processes involved in the growth and differentiation of the conceptus from the time of fertilization of the ovum until the eighth week of gestation. The stages are related to the biological status of the unborn child and involve the differentiation of the various cells, tissues, and organ systems and the development of the main external features of the embryo. It occurs from approximately the end of the second week to the eighth week of intrauterine life. The fetal stage follows these stages, beginning at about the ninth week of gestation. The entire process of growth and development of the embryo and fetus is loosely called prenatal development. See also prenatal development.
References in periodicals archive ?
Ductal anomalies arise from variations in the fusion of the ventral and dorsal pancreatic buds during embryological development and are usually clinically insignificant.
They are usually female probably because the female embryological development maintains drainage of urine so the renal function is preserved.
Additionally, bones are classified according to the manner of embryological development.
In congenital epidermoid tumors, a benign tumor forms as the result of inclusion of ectodermal tissue during normal tube formation at between 3-5 weeks of embryological development (3).
There is evidence that epigenetic factors play an important role in the aetiology of NTDs, which may help to explain the way in which environmental factors influence embryological development.
In small amounts however, my Unani tutors were unanimous in asserting that Black Bile has a critical role to play in health, creating strong healthy bones, driving embryological development and vitalising the blood --all alchemical 'mecurial' processes.
A study of egg development conducted in 2007 and 2008 with hatchery-reared cobia eggs provided embryological development characteristics and insight on time of day of spawning for wild cobia.
A combination of the developmental theory and the ganglion theory has also been suggested in which a joint-related ganglion like structure is incorporated into the developing vessel during embryological development which enlarges over the years due to secretions from synovial rests within the cyst.
Use evidence obtained from technology to compare similarities in DNA sequences, anatomical structures, and order of appearance of structures in embryological development to support common lines of descent in evolution.
They result from altered migration of pigment cell precursors during embryological development.
4) The gastrointestinal and genito-urinary tracts share the same embryological development, pelvic location, innervasion and passage through the levator ani.
After external fertilization between a mature egg and a sperm in the water column, embryological development occurs as a single cell divides by mitosis.