PGT technology upgrade again! The first “PGH”baby was born in Nanjing Maternity and Child Health care Hospital
Recently, The first “PGH”baby was born in Nanjing Maternity and Child Health care Hospital,the born of this healthy baby means that we have successfully blocked the parent-child transmission and the offspring avoid the “family curse”of infertility or repeated abortion.
What is PGH technology?
Let’s take a look at the concept of chromosome translocation. It is a kind of common chromosomal structural abnormality, and its frequency is about 1-2/2000 in newborns. Patients themselves have no abnormal clinical manifestations, but their gametes(sperm or egg)in the process of meiosis will transfer unbalanced chromosome to the offspring, resulting in repeated abortion, arrested fetal development,or even give birth to mentally retarded or deformed children! In theory, 16/18 of the gametes produced are abnormal,1/18 are carrier gametes, and only 1/18 are completely normal gametes. Chromosomal balanced translocation patients often experience multiple embryo stop, abortion, may still not be able to obtain a healthy baby!
At present, conventional PGT-A technology cannot distinguish normal embryos from translocation carrying embryos. With PGT-A technology, patients still have 50% of the possibility to give birth to a child with balanced translocation, and the child are likely to face the problems of infertility, repeated abortion, birth defects etc. when they reach the stage of childbearing age, the latest PGH technology can help patients to avoid these problems.
PGH technology helps couples get healthy babies.
Ms.Jiang only had one biochemical pregnancy since they got married three years ago. With a strong desire to have own children, they came to the reproductive medical center of Nanjing Maternal and child health care hospital. The director Ling Xiufeng's team conducted a number of tests related to infertility. Among them, G-banding karyotype analysis in peripheral blood showed that the woman had a translocation of chromosome 11 and chromosome 22, which may be the main cause of Ms. Jiang's inability to conceive baby for many years.
According to the situation of Ms.Jiang couple, Ling Xiufeng medical tem decided to adopt PGH technology for targeted treatment, and formulated a detailed clinical treatment plan for the couple. Eight blastocysts were obtained by oocyte extraction, ICSI, embryo culture, biopsy. By PGH technology, 2 normal embryo were selected out. Ms Jiang successfully pregnant got pregnant after embryo transfer. Amniocentesis was carried out at 18 weeks of gestation. The prenatal diagnosis results were consistent with the embryo test results, and the fetus had no chromosomal abnormalities. Ms.Jiang couple finally realized their dream of having a healthy baby.
According to Zhang Junqiang, director of the embryo laboratory, for couples who are carriers of severe pathogenic genes or experienced long term infertility, PGT technology could help the couple to select the normal embryo for transfer, so as to block the intergenerational transmission of genetic disease. PGH technology is a breakthrough upgrade of the pre-implantation genetic testing technology, which can block the transmission of chromosome translocation in the family, realizes the accurate screening of embryos, and brings new hope for more families!