Controlled Ovarian Stimulation and Egg Retrieval Explained — The Key Step in Scientific Conception through IVF in the U.S. and Mexico

2025-10-28 21:05:46，浏览量： 6次

 

In U.S. and Mexico IVF and egg-freezing treatments, ovarian stimulation is the most critical stage determining overall success. It not only affects the number of eggs retrieved but also directly influences the quality of embryos developed in IVF-PGT. Understanding the full process of ovarian stimulation and egg retrieval helps individuals plan conception more scientifically, ease anxiety, and build confidence throughout treatment.

 

Controlled ovarian stimulation involves precise medication management to promote the simultaneous development of multiple follicles within a single cycle, allowing the collection of more healthy eggs. Dr. Nathan Zhang, founder of IVF USA and a graduate of the University of Pennsylvania School of Medicine, notes that reproductive centers in the U.S. and Mexico lead globally in medication monitoring and laboratory management, offering highly personalized adjustments based on each patient’s hormone levels and ovarian response.

 

Before entering the main stimulation phase, doctors typically design a customized conditioning plan according to the menstrual cycle and ovarian reserve. Some women may use short-term birth control pills or estrogen patches prior to or at the beginning of the cycle to balance hormones and synchronize follicle growth, creating a stable endocrine environment for subsequent treatment. Though brief, this step sets the foundation for the consistency and effectiveness of the following stimulation phase.

 

The stimulation phase usually lasts 8 to 10 days, during which daily hormone injections are administered. Through ultrasound and blood tests, doctors dynamically monitor follicle growth and hormone changes, adjusting medication dosages in real time to maintain the best balance between egg quantity and quality. This level of precision is a major reason behind the high success rates of U.S. and Mexico IVF treatments.

 

Once the follicles have matured, a trigger shot is administered to induce final maturation, and egg retrieval takes place approximately 36 hours later. The egg retrieval procedure is a minimally invasive operation performed under ultrasound guidance, lasting about 10 to 15 minutes under mild anesthesia. It is a painless process, and most patients can resume normal activities the same day. Some may experience mild bloating or fatigue, which usually subsides within one to two days.

 

In advanced laboratories across the U.S. and Mexico, the retrieved eggs are immediately evaluated by embryologists for quality and either vitrified for preservation or used in the IVF-PGT process. This seamless and efficient workflow enhances egg and embryo survival rates, minimizes procedural risk, and exemplifies the international standardization of reproductive medicine.

Dr. Nathan Zhang established IVF USA over a decade ago to provide professional international fertility consultation and services, including U.S. egg freezing, U.S. IVF, and third-party reproductive assistance. With nearly 20 years of expertise in global fertility care, IVF USA has expanded into the Mexican market as the official China representative of Power Fertility Center (POWER IVF Mexico). Dr. Zhang’s work now spans beyond the U.S. to include IVF and egg-freezing programs in Mexico, Japan, Thailand, Taiwan, and Hong Kong. Guided by a deep respect for reproductive science and the value of life itself, they continue helping people find their own rhythm—steadily moving between science and hope toward the beginning of new life.