Cohort Profile：The Shandong Adenomyosis Cohort of Population Undergoing Reproductive Technology (SAart)

Previous studies have shown that compared with infertile women without adenomyosis, the clinical pregnancy rate, live birth rate and continuous pregnancy rate of women with adenomyosis significantly reduce, and the abortion rate obviously increased. However, these studies lack a definite classification of adenomyosis, so the true effect of adenomyosis with different severity on pregnancy outcomes are not clear. Our research team intends to collect clinical data of infertility patients with adenomyosis receiving IVF and the detailed classification of adenomyosis according to MUSA and ultrasound consensus. Finally, we can have an objective recognition of adenomyosis on pregnancy outcomes, which also bring benefits to evidence-based clinical practice. The detailed inclusion and exclusion criteria are as follows: Inclusion criteria 1.Age of all participants ≥ 20 and \< 38 years. 2.Receiving IVF treatment because of adenomyosis or other common factor, such as fallopian tube factors. 3.Conforming to MUSA criteria. 4. Body mass index \< 30 kg/m2. 5.The level of AMH ≥ 0.8 ng/ml. Exclusion criteria 1. Uterine fibroids (International Federation of Gynecology and Obstetrics (FIGO) type 0--I--II or type III--IV fibroids \> 3 cm). 2. Untreated endometrial polyps, hydrosalpinx or uterine adhesions. 3. RSA or RIF. 4. Intracytoplasmic sperm injection (ICSI) and preimplantation genetic testing (PGT). 5. Concurrent and/or recent involvement in other research within previous 3 months of study enrolment.