Can severe male factor infertility be treated without micromanipulation?

Area of Science:

• Reproductive Medicine
• Infertility Treatment
• Assisted Reproductive Technologies

Background:

• Severe male factor infertility, characterized by low sperm count and motility, presents significant challenges for achieving conception.
• Traditional in vitro fertilization (IVF) may have limited success rates in such cases, often necessitating advanced techniques like micromanipulation.

Purpose of the Study:

• To evaluate the efficacy of modified IVF laboratory methods in treating severe male factor infertility.
• To compare the outcomes of these modified IVF techniques with reported data for gamete micromanipulation.

Main Methods:

• A retrospective analysis of 71 patients with severe oligoasthenozoospermia (total motile sperm count < 5 x 10^6).
• Semen treatment involved mini-Percoll, and IVF modifications included higher sperm insemination numbers, use of culture tubes, and pooling of oocytes.
• Patients were divided into two groups based on total motile count: Group I (1.5-5 x 10^6) and Group II (<1.5 x 10^6).

Main Results:

• An overall fertilization rate of 38% per oocyte was achieved in 80% of patients.
• Clinical pregnancy rates were 43% per transfer and 35% per cycle, with 50% of patients having surplus embryos for cryopreservation.
• Group I showed higher fertilization (54%) and pregnancy rates (56% per transfer) compared to Group II (25% fertilization, 32% per transfer).
• Of 28 patients with prior fertilization failure, 25 achieved fertilization, leading to 8 pregnancies.

Conclusions:

• Modified standard IVF laboratory methods can achieve successful monospermic fertilization, embryo cleavage, and high clinical pregnancy rates in severe male factor infertility.
• These modifications provide an effective alternative to micromanipulation, improving IVF success for patients with severe sperm defects.