Controlled Ovarian Hyperstimulation (COH)
Controlled Ovarian Hyperstimulation (COH) is the the development of multiple ovarian follicles, than the normal count in a female’s menstrual cycle. This juncture is reached with the help of certain fertility medications. Once several follicles start developing, the number of functional eggs also increases, which in turn lead to greater chances of conceptio
When and why is COH needed?
How does COH work?
The primary objective of COH is to normalise and enhance the functions of the ovaries. The fertility drugs which are prescribed to a patient help in controlling the endocrine functions. Therefore, with the assistance of these drugs, the doctor can predict the timing of hormonal changes, which is otherwise impossible to do.
This overall supervision will assist the doctor to judge the quality of the eggs that will be produced. On the basis of these conclusions, the doctor will be able to suggest to the patient, the most suitable technique of artificial insemination like IUI, IVF.
Does COH increase the chances of conception?
COH is considered to be an added help for one who is trying to conceive via IUI, IVF, etc. It has been observed that if COH is followed by an IUI procedure, the chances of conception increase.
Even though the chances of pregnancy decrease with age, women with advanced maternal age have successfully conceived with the help of COH coupled with IUI or an IVF cycle.
Frequently Asked Questions
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What is ovarian stimulation?
Ovarian stimulation is a fertility treatment where medications are used to help the ovaries produce one or more mature eggs. It is commonly used in IUI, IVF, or egg freezing cycles and also helps women with ovulation problems release eggs more regularly.
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What is controlled ovarian hyperstimulation?
Controlled ovarian hyperstimulation, or COH, is a carefully monitored process where fertility drugs stimulate the ovaries to produce multiple eggs. Doctors control hormone levels and egg development through scans and blood tests to improve the chances of pregnancy with treatments like IUI or IVF.
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How long does ovarian stimulation take?
Ovarian stimulation usually lasts about 8 to 14 days. During this time, hormone injections are given, and ultrasound scans are done to monitor follicle growth. The exact duration varies depending on how the ovaries respond to the medications.
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When does ovarian stimulation start for IVF?
Ovarian stimulation for IVF typically starts on day 2 or 3 of the menstrual cycle. After a baseline ultrasound and blood tests, fertility medications are begun to encourage multiple eggs to develop. Regular monitoring ensures the timing is safe and effective.
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Is ovarian stimulation painful?
Ovarian stimulation is generally not painful. Some women may feel mild discomfort, bloating, or pressure in the lower abdomen as the ovaries grow. The injections may cause slight stinging, but most women tolerate the process well with minimal discomfort.






