How big is the follicle in the test tube?

Nowadays, many young people advocate celibacy and not having children, but some parents have special requirements. Therefore, many young people will freeze their eggs and undergo in vitro fertilization at the appropriate time. However, when retrieving the eggs, you must pay attention to the size of the eggs. Women will release one egg every month, and the number is relatively small. Therefore, when retrieving the eggs, you must pay attention to the method to ensure the survival rate. I will give you a detailed introduction below.

Whether it is natural conception or in vitro fertilization, the importance of a high-quality egg is self-evident. The most important purpose of monitoring ovulation is to monitor the growth of follicles and track the number of follicles and their morphological changes during their growth and development. In this way, the doctor can adjust the dosage and time of ovulation-inducing drugs according to the development of the follicles. It can also help the doctor determine an appropriate time for HCG injection (Note: HCG injection before egg retrieval is to promote the maturation of eggs, which is conducive to obtaining suitable eggs and plays a key role in the entire IVF process) so as to obtain the best quality eggs, thereby improving the quality of the embryo and increasing the success rate of IVF.

Our doctors will determine the duration of follicle monitoring based on the patient's physical condition. During the monitoring period, the doctor can use B-ultrasound to discover and understand the number and size of the follicles that are induced to grow, and then appropriately adjust the dosage and duration of ovulation-inducing drugs based on the monitoring results. Generally speaking, on the 10th-12th day of the menstrual cycle, the number of dominant follicles can reach 2-3, and can develop to a size of 40px. However, you cannot rush to retrieve the eggs at this time. The time to inject HCG should be determined based on the thickness of the endometrium and the urinary LH peak. Because everyone's physical constitution is different and their responses to ovulation-stimulating drugs vary, our doctors will determine the time for egg retrieval by monitoring the development of follicles.

B-ultrasound monitors the number of follicles on the ovaries, including large and small mature and immature follicles, while the number of eggs retrieved is the number of eggs observed under a microscope after the follicular fluid in the follicular cavity is aspirated. Moreover, after ovulation induction treatment, the development speed and size of each follicle are different, so some follicles contain eggs while others do not. There are also some patients with empty follicle syndrome who still have a very low number of eggs obtained even with the egg flushing method. Therefore, we can estimate the possible number of eggs obtained based on the B-ultrasound results, but the number of eggs retrieved and the number of follicles monitored are not necessarily the same.