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An increase in vasopressin has been observed in female rats which have just given birth. Vasopressin is associated with aggressive and hostile behaviours, and is postulated to decrease sexual motivation in females. Vasopressin administered in the female rat brain has been observed to result in an immediate decrease in sexual motivation. [13]
A later alternative to the rabbit test, known as the "Hogben test", used the African clawed frog, and yielded results without the need to cut the animal open. [6] Modern pregnancy tests continue to operate on the basis of testing for the presence of the hormone hCG in the blood or urine, but they no longer require the use of a live animal.
It appears to be safe to use during pregnancy. [1] It is a synthetic analogue of vasopressin, the hormone that plays roles in the control of the body's osmotic balance, blood pressure regulation, kidney function, [2] and reduction of urine production. [1] Desmopressin was approved for medical use in the United States in 1978. [1]
The two primary methods are testing for the female pregnancy hormone (human chorionic gonadotropin (hCG)) in blood or urine using a pregnancy test kit, and scanning with ultrasonography. [1] Testing blood for hCG results in the earliest detection of pregnancy. [2] Almost all pregnant women will have a positive urine pregnancy test one week ...
Effect of pregnancy on endocrine function tests. [5] Hormone Test Result FSH, LH: GnRH stimulation: Unresponsive from third gestation until several weeks postpartum Growth Hormone: Insulin tolerance test: Response increases during first half of pregnancy and then normalizes until several weeks postpartum TSH: TRH stimulation: Response unchanged ...
The use of lysine vasopressin is contraindicated in the presence of hypersensitivity to beef or pork proteins, increased BUN and chronic kidney failure. It is recommended that it be cautiously used in instances of perioperative polyuria , sensitivity to the drug, asthma, seizures, heart failure, a comatose state, migraine headaches, and ...
Urine-based pregnancy tests detect hCG in the urine, while blood-based pregnancy tests measure the level of hCG in the blood. [5] The presence of hCG in a woman's body indicates that a fertilized egg has implanted in the uterus and the placenta has started to form. 10 days after fertilization, significant hCG can be detected from woman's blood ...
A fluid or water deprivation test is a medical test [1] which can be used to determine whether the patient has diabetes insipidus as opposed to other causes of polydipsia (a condition of excessive thirst that causes an excessive intake of water). The patient is required, for a prolonged period, to forgo intake of water completely, to determine ...