Test on Intracytoplasmic Sperm Injection (ICSI) Overview

Question 1: Intracytoplasmic sperm injection (ICSI) consistently leads to a higher euploidy rate in embryos compared to conventional insemination in cases of nonmale factor infertility.

A. Ano

B. Ne

Explanation: The study by Patel et al. (2023) indicates that ICSI provides no benefit in cases of nonmale factor infertility as evidenced by comparable or even lower euploidy rates compared to conventional insemination. Table 3 shows euploid rate ratios for ICSI vs. conventional insemination that are consistently below 1 (e.g., Unadjusted RR 0.94, Multivariable adjusted RR 0.89), with P values <.001, suggesting a statistically significant lower euploid rate for ICSI in these circumstances.

Question 2: Based on the provided study materials, which statement accurately describes the preimplantation embryo's sensitivity to physical or chemical stress, particularly in the context of oocyte manipulations like ICSI?

A. The blastocyst is the most sensitive stage to stress, followed by the fertilized oocyte.

B. The fertilized oocyte is more sensitive to stress than a cleavage stage embryo or an embryo post-compaction.

C. Embryos are uniformly susceptible to stress regardless of their developmental stage.

D. Stress primarily impacts the blastocyst stage, causing poor quality results.

Explanation: Figure 5 states that 'The fertilized oocyte is more sensitive than the cleavage stage embryo, which in turn is more susceptible to stress than an embryo post-compaction.' It also notes that 'Of all stages, the blastocyst is least perturbed by such factors.' The text further links 'oocyte manipulations' to potentially resulting in 'no blastocysts or poor quality blastocysts'.

Question 3: Unexplained infertility is considered an indication for intracytoplasmic sperm injection (ICSI).

A. Ano

B. Ne

Explanation: The study materials indicate that unexplained infertility is an indication for ICSI, citing unknown fertilization factors or occult male factor as the clinical rationale.

Question 4: Based on the provided study materials, what is the clinical rationale for considering Intracytoplasmic Sperm Injection (ICSI) in cases of advanced maternal age?

A. To address an age-related decline in sperm motility.

B. To mitigate an age-related decline in oocyte quality.

C. To avoid paternal DNA contamination during preimplantation genetic diagnosis.

D. To overcome zona pellucida hardening in in vitro maturation.

Explanation: The study materials state that for 'Advanced maternal age', the clinical rationale for ICSI is 'Age-related decline in oocyte quality'.

Question 5: The study by Dang et al. (Lancet 2021) reported a higher percentage of total fertilisation failure in the intracytoplasmic sperm injection group compared to the conventional IVF group.

A. Ano

B. Ne

Explanation: The Dang et al. (Lancet 2021) study reported a total fertilisation failure rate of 5% in the intracytoplasmic sperm injection group and 6% in the conventional IVF group, indicating a higher rate in the conventional IVF group, not the ICSI group.