Fetal development
Definition
This article discusses how a human baby is conceived and how the baby develops inside the mother's womb.
Fetal development
Alternate Names : Zygote, Blastocyst, Embryo, Fetus
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Fetal Development
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Pregnancy and delivery involve the entire female reproductive system, including the ovaries, fallopian tubes, uterus, and vagina.
Fetal Development begins after the 11th week, when the baby is called a fetus. From the 11th to 16th week, the fetus begins developing distinguishable genitals, hair, nails and vocal chords.
Fetal development during the first trimester
The most dramatic changes and development occur during the first trimester. During the first eight weeks, a fetus is called an embryo.
Fetal development during the third trimester:
During the third trimester, the fetus continues to grow in size and weight. The lungs are still maturing and the fetus begins to position itself head-down.
Fetal development
If the body doesn't produce enough testosterone during fetal development, growth of external sex organs may be impaired.
Fetal development
The sex chromosomes X and Y - you receive an X from your mother and either an X or a Y from your father - determine whether the gonads in an embryo develop into ovaries (XX) or testicles (XY).
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During fetal development, the outer ear or "pinna" forms at a time when many other critical organs are developing (such as the kidneys).
During fetal development, a baby's kidneys first appear as buds inside the pelvis, near the bladder. As the fetal kidneys develop, they climb gradually toward their normal position near the rib cage in the back.
During fetal development, the spine forms first as a single column of tissue that later separates into segments that become the bony vertebrae.
Abnormal fetal development
Unknown (Scheuermann's kyphosis)
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In normal fetal development, the neural tube forms by the closure of the neural structure. When this does not occur in the case of an encephalocele, the result is a groove.
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The median umbilical ligament is formed as the allantoic stalk during fetal development and lasts through life. Also called urachus.
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A congenital disorder can be because of a genetic defect or acquired at any time during fetal development.
Deletion: the absence of genetic material on a chromosome.
DNA: deoxyribonucleic acid is the 'building block' for all genetic material.
Iniencephaly is a rare birth defect caused by improper closure of the neural tube (the part of a human embryo that becomes the brain and spinal cord) during fetal development.
Optic nerve hypoplasia occurs in the early stages of fetal development, when the eyes are forming. The optic nerve never fully develops or, once developed, dies-off and reduces in size for unknown reasons.
Anencephaly is a defect in the closure of the neural tube during fetal development. The neural tube is a narrow channel that folds and closes between the 3rd and 4th weeks of pregnancy to form the brain and spinal cord of the embryo.
Testosterone is the primary hormone for development in men, particularly during fetal development and during puberty. Although there are small levels of testosterone found in women, they are much less than found in their male counterparts.
Gestation: the period of fetal development in the womb from implantation to birth. Gestational diabetes: carbohydrate intolerance during pregnancy that usually resolves itself after delivery. This is the most common pregnancy complication.
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Hemoglobin F (HbF) is a form of hemoglobin that is produced during fetal development in the womb. (The F in HbF stands for fetal.) It is usually present for only a short time after birth.
Instead of forming an embryo, the tissue grows into a mound of cells that look like grape-like cysts; there is no evidence of normal fetal development. Partial molar pregnancy begins with fertilization of an egg by two sperm.
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DiGeorge syndrome (DGS) is a complex disorder associated with a wide variety of symptoms that is present at birth and occurs as a result of the deletion of a portion of chromosome 22 during early fetal development.
The anti-hypertensive agents used during pregnancy need to be safe for normal fetal development.
The disorder is currently considered "a nonspecific developmental field defect" occurring at about the sixth week of fetal development.
A congenital heart defect (CHD) is a heart problem which is present at birth, caused by improper development of the heart during fetal development.
There is a high concordance rate of AML in identical twins, which is believed to be in large part a result of shared circulation and the inability of one twin to reject leukemic cells from the other twin during fetal development.
Exstrophy of the bladder is a complex combination of disorders that occurs during fetal development. The disorder usually involves many systems in the body, including the urinary tract, skeletal muscles and bones, and the digestive system.
may decrease during pregnancy and there have also been documented very few cases of thyroid disorders in pregnant women, due to the fact that the immune system is slightly depressed during pregnancy in order to protect the fetal development.
Results from an incomplete canalization of the vagina during fetal development. There are a large variety of possible septums, ranging from complete and thick to incomplete and narrow.
The development of the brain and nervous system begins early in fetal development. During an ultrasound, the technician usually looks for the presence of brain ventricles. Ventricles are spaces in the brain that are filled with fluid.
During early stages of fetal development, fast-growing, immature cells called retinoblasts form. Later, these cells become retinal cells. In retinoblastoma, some of these cells quickly grow out of control.
It occurs during fetal development as the kidneys move into their normal position. With horseshoe kidney, however, as the kidneys of the fetus rise from the pelvic area, they fuse together at the lower end or base.
DiGeorge syndrome may result from abnormal fetal development of the third and fourth pharyngeal pouches (during the 6th to 12th week of gestation) that interferes with the formation of the thymus and parathyroid glands.
Reproductive outcomes generally refer to pregnancy outcomes, effects on fetal development, and damage to the reproductive system of the adult. Thus they can include, for example, miscarriage, birth defects, or infertility in women or men.
It occurs as a random event during cell division in early fetal development.
Researchers indicate that there may be various possible causes of isolated lissencephaly, including viral infections or insufficient blood flow to the brain during fetal development or certain genetic factors.
CAUSES"Also called trisomy 21, Down syndrome occurs during fetal development, but is not inherited. The problem is an extra 21st chromosome. It occurs in 1 out of 700 live births.
A diaphragmatic hernia is caused by the improper joining of structures during fetal development. As a result, the abdominal organs such as the stomach, small intestine, spleen, part of the liver, and the kidney appear in the chest cavity.
Ectopia cordis is the displacement of the heart outside the body during fetal development
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Joints and bones usually grow normally during fetal development. However, in a small percentage of newborns, the pelvis has not formed its usual deep socket. Therefore, the head of the thighbone can slip partially or completely out of the socket.
Many researchers in the area of fetal development believe that a fetus is unlikely to feel pain until after the seventh month of pregnancy. Others disagree.
The collection of special tissues that are associated with fetal development and which are expelled after the delivery of the body. See also Placenta.
Agalactia
The inability to produce milk after childbirth.
kleft plt noun a congenital condition in which the palate does not fuse during fetal development causing ...
cleidocranial dysostosis
kladkrenil dss tss noun a hereditary bone malformation with protruding jaw lack of collarbone and malformed ...
It is a congenital anomaly or birth defect that occurs during fetal development in about 1 out of 5,000 female births.
Abdominal adhesions cause female infertility by preventing fertilized eggs from reaching the uterus, where fetal development takes place.
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Genetic Diseases, Inborn - Diseases that are caused by genetic mutations present during embryo or fetal development, although they may be observed later in life. The mutations may be inherited from a parent's genome or they may be acquired in utero.
birth defects
Abnormalities in a man's reproductive system can occur during fetal development. Some birth defects are due to a man's exposure to DES (diethylstilbestrol) taken by his mother during pregnancy.
A partial molar pregnancy means there is an abnormal placenta and some fetal development.
In a complete molar pregnancy, there is an abnormal placenta but no fetus.
It can occur at any structure (most notable is an iris coloboma, but it can also occur in the eyelid, lens, choroid, or optic disc) and the location where it occurs is related to the point in fetal development at which growth was halted.
If you are pregnant, do not take 10,000 international units of vit A daily because of reported problems in fetal development.
Children should not take more than 18,000 international units daily for more than one month.
 See also: Symptom, Surgery, Pregnancy, Kidney, Aging
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