To determine whether using DNA methylome to select embryos can increase the live birth rate.

The rationale for the study is to establish the risk/benefit ratio of PIMS in women with in vitro fertilization (IVF) treatment, as DNA methylome is a potential biomarker in blastocyst selection in assited reproductive technology (ART). DNA methylation plays an important role during embryogenesis, global abnormal methylome reprogramming often occurs in human embryos, and DNA methylome pattern is associated with live birth rate. However, there is still no technology using DNA methylome as an indicator in preimplantation embryo screening. Recent paper reported that using Pre-implantation Methylome Screening (PIMS) can select embryos with better methylation state and euploid chromosomes. The efficiency of PIMS needs further validation through randomized clinical trial.

Inclusion Criteria:

1. Women who plan to undergo IVF/ICSI/PGT-A treatment.
2. Women aged 20 years and older.

b) Women who obtain 2 or more good-quality blastocysts that defined as morphological score of inner cell mass B or A, trophectoderm C or better, and grade 4 or better on Day 5 of embryo culture.

Exclusion Criteria:

4.2 Exclusion Criteria

1. Women with a uterine cavity abnormality, such as a uterine congenital malformation (uterus unicornate, bicornate, or duplex); untreated uterine septum, submucous myoma, or endometrial polyp(s); or with history of intrauterine adhesions.
2. Women who are indicated and planned to undergo preimplantation genetic testing for structural rearrangements (PGT-SR) or preimplantation genetic testing for monogenic (PGT-M).
3. Women who use donated oocytes or sperm to achieve pregnancy;
4. Women with contraindication for assisted reproductive technology or for pregnancy, such as poorly controlled Type I or Type II diabetes; undiagnosed liver disease or dysfunction (based on serum liver enzyme testing); renal disease or abnormal serum renal function; significant anemia; history of deep venous thrombosis, pulmonary embolus, or cerebrovascular accident; uncontrolled hypertension, known symptomatic heart disease; history of or suspected cervical carcinoma, endometrial carcinoma, or breast carcinoma; undiagnosed vaginal bleeding.