The (motile sperm organelle morphology examination) MSOME allows the detection of sperm vacuoles that seems to be related to sperm DNA damage. The investigators hypothesized that couples with unexplained infertility could benefit from the injection of spermatozoa selected under high-magnification (x6600)
When routine infertility workup yields normal results in both partners, the couple is defined as suffering from unexplained infertility. These couples present normal semen analysis. It has been reported that even infertile patients with normozoospermic parameters can have higher values of DNA damage than fertile controls. It has been proposed that the use of ''invisible damaged'' spermatozoa could result in fertilization failure, impaired normal embryo development, reduced implantation and pregnancy rates. The motile sperm organelle morphology examination (MSOME) allows the detection of sperm vacuoles that seems to be related to sperm DNA damage. The investigators hypothesized that couples with unexplained infertility could benefit from the injection of spermatozoa selected under high-magnification (x6600)
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
ICSI Sperm selection in the ICSI group is analyzed under a magnification of 400x using an inverted microscope. ICSI is performed in a micro-injection dish prepared with 4 µL droplets of buffered medium and covered with paraffin oil on a heated stage at 37.0 ± 0.5°C of an inverted microscope.
Sperm selection in the IMSI group is analyzed at high magnification using an inverted microscope equipped with high-power differential interference contrast optics. The total calculated magnification is x6.600. The sperm cells exhibiting normally shaped nuclei (\[1\] smooth, \[2\] symmetric, and \[3\] oval configuration) and \[4\] normal nuclear chromatin content (if it contained no more than one vacuole, which occupies \<4% of the nuclear area) are selected for injection.
Sapientiae Institute
São Paulo, São Paulo, Brazil
Pregnancy rate
Number of pregnancies divided by the number of cycles with embryo transfer
Time frame: 1 month
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