Piezo-ICSI to Improve the Developmental Potential of Fertilized Oocytes in Aged Infertility Women With Assisted Reproductive Technology

Overview

The goal of this clinical trial is to test Piezo-ICSI on improving oocyte fertilization and embryo development in elderly infertile patients undergoing intracytoplasmic sperm injection (ICSI). The main question it aims to answer is whether Piezo-ICSI could improve oocyte fertilization and embryo development. Participants requested ICSI are asked to randomly culture equal numbers of oocyte and embryo with or without Piezo-ICSI. At the time of injection, two or more mature oocytes were split into two groups (i) conventional ICSI and (ii) Piezo-ICSI (50:50 split).

After being informed about the study and potential risks, all participants will write the informed contents. This study is a randomized controlled study compare different ICSI methods on the fertilization and embryo development. Sibling oocytes were randomly divided into test group (Piezo-ICSI) and control group (conventional ICSI). Specific method of randomization: all the oocytes of each subject were distributed into two dishes (dish 1 and dish 2). If the oocyte number is odd, put the extra oocyte into dish 1. Using statistical software, the two dishes were randomly treated as test group and control group. Thus, a random allocation table was generated and a separate random envelope was made for each subject. The random envelope is kept and distributed by the relevant personnel who are not involved in the screening and treatment of subjects and are authorized by the researcher. Each selected subject must open the random envelope. The subjects were subjected to routine ovulation promotion, and then the acquired oocytes and cumulus cell complexes (COCs) were obtained and fertilized in vitro. The test group oocytes were fertilized with Piezo-ICSI, while the control oocytes were fertilized with conventional ICSI. Thus, half of the oocytes from each elderly infertile patient were treated with Piezo-ICSI.