Intrauterine platelet rich plasma will be injected in the endometrial region via the vaginal route after the cessation of menstrual period. The endometrial thickness will be assessed under ultrasound and hormone replacement will be started. As the endometrial thickness reaches adequate thickness during ultrasound follow-up, embryo transfer will be performed.

Intrauterine platelet rich plasma will be injected in the endometrial region via the vaginal route after the cessation of menstrual period. In the second menstrual period following the PRP injection, the endometrial thickness will be assessed under ultrasound and hormone replacement will be started. As the endometrial thickness reaches adequate thickness during ultrasound follow-up, embryo transfer will be performed. Pregnancy test results will be recorded and followed.

Inclusion Criteria:

• Women in whom cycle was cancelled due to an endometrial thickness <7 mm when progesterone start was planned in patients undergoing frozen embryo transfer with hormone replacement therapy
• Women with a history of Asherman syndrome, but no obvious intrauterine adhesion in the last hysteroscopic procedure;
• Women who have at least 2 frozen good-quality embryos.

Exclusion Criteria:

• Women with any other known cause of implantation failure, such as poor embryo quality, or congenital uterine anomalies, endometrial polyp or fibroid,
• Previous diagnosis of any malignancy,
• Anticoagulant use for which plasma infusion is contraindicated,

All infertile women desiring pregnancy