Due to COVID19 Pandemic effect on 2020.

Stimulation protocols for IVF underwent several cycles of upgrading aiming to achieve reasonable outcomes with low-cost cycles. Antagonist protocols have been introduced as effective and comparable to long agonist regarding the outcomes. However, these protocols are still costly. Alternative protocols using progestin suppressions appear options for consideration.

Inclusion Criteria:

1. Women age of ≥ 18 to ≤ 40;
2. BMI of ≤ 31;
3. All indication for freeze-all
4. PCOS;
5. Women who have ≥ 1 year of primary or secondary infertility;
6. Tubal factor (unilateral, bilateral obstruction or salpingectomy);
7. Fresh ejaculate sperm of any count provided they have ≥ 1% normal forms and a motile fraction;
8. Women undergoing their first ICSI cycle or following a previous successful attempt;
9. Women undergoing only frozen-thawed embryo transfer;
10. Women with > 8 mm endometrial thickness at the day of progesterone supplementation in the transfer cycle;
11. Women with no detected uterine abnormality on transvaginal ultrasound (e.g. submucosal myomas, polyps or septa).

Exclusion Criteria:

1. Unilateral oophorectomy;
2. Uterine pathology or abnormality;
3. Abnormal karyotyping for them or their male partners;
4. History of repeated abortions or implantation failure;
5. Uncontrolled diabetes;
6. Liver or renal disease;
7. History of malignancy or borderline pathology;
8. Endometriosis;
9. Plan for PGD-A;
10. Severe male factor includes surgical sperm retrieval or cryopreserved sperm.