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When should I start taking my Cetrotide shots?

By Paloma de la Fuente Vaquero M.D., Ph.D., M.Sc. (gynecologist).
Last Update: 02/04/2019

Cetrotide is a drug included in the so-called antagonist drugs, its main function is to prevent spontaneous ovulation.

There are two protocols for the administration of the antagonist drugs. One consists of a single dose (3 mg subcutaneously) with the possibility of repeating it after 72 hours and the other involves a multiple dose (0.25 mg per day subcutaneously). In our environment, the most widely used protocol is the multiple dose.

The antagonist drug should be started on the sixth day of stimulation or when there is a follicle larger than 14 mm. Both protocols are valid and can be used in assisted reproduction treatments.

 Paloma de la Fuente Vaquero
Paloma de la Fuente Vaquero
M.D., Ph.D., M.Sc.
Gynecologist
Bachelor's Degree in Medicine from the Complutense University of Madrid, with a Master's Degree in Human Reproduction and a Doctorate in Medicine and Surgery from the University of Seville. Member of the Spanish Fertility Society (SEF) and the Spanish Society of Gynecology and Obstetrics (SEGO), she performs as a gynecologist specializing in assisted reproduction in the clinic IVI Sevilla.
License: 4117294
Gynecologist. Bachelor's Degree in Medicine from the Complutense University of Madrid, with a Master's Degree in Human Reproduction and a Doctorate in Medicine and Surgery from the University of Seville. Member of the Spanish Fertility Society (SEF) and the Spanish Society of Gynecology and Obstetrics (SEGO), she performs as a gynecologist specializing in assisted reproduction in the clinic IVI Sevilla. License: 4117294.