The paraphrase does not do justice to actually reading the text and quoting from it accurately. The source was not cited but this is "Male age" article in question.
JOURNAL OF ASSISTED REPRODUCTION AND GENETICS, Volume 25, Number 4, 137-143, DOI: 10.1007/s10815-008-9215-4, ASSISTED REPRODUCTION, Male age influences oocyte-donor program results
Eliezer Girsh, Nathan Katz, Leonid Genkin, Ofer Girtler, Jaron Bocker, Sofa Bezdin and Ilya Barr
"The purpose of our research was to examine the relationship between male age and semen parameters in a range of ages (from 20s to 60s) in Egg Donation Program (EDP) cycles. EDP provides a pool of high quality oocytes, thus allowing better analysis of the sperm efficacy."
First of all, the researchers explain their purpose, oocytes.
"Our study confirms that sperm parameters are reduced by age and suggests that this age-dependent effect could be a reason for failures in IVF cycles even in EDP couples."
Secondly, their conclusion is in regards to couples, male and female, and they address both genders.
"While some investigators have found a lower pregnancy rate in recipients of more advanced age, others have not observed this relationship."
The actual study, "Male age," points out that research demonstrates that age is not a consistent factor.
This is a reference to a contrarian study:
Cf. Paulson RJ, Hatch IE, Lobo RA, Sauer MV. Cumulative conception and live birth rates after oocyte donation: implications regarding endometrial receptivity. Hum Reprod 1997; 12:8359.
In the "Male age" study:
"The average age of 484 men in the study was 45.98.2 years old (range 2560 years old; The recipient women's average age was 44.36.81 years old (range 2454)."
They did not examine men older than 60.
The authors state:
"In addition, there is no consensus on the direct relationship between spermatozoa morphology and genetic abnormalities. It has been postulated that there is no correlation between sperm morphology and genetic condition, which leads us to believe that there is no guarantee that spermatozoa with good morphology will not have any genetic abnormalities, and vice versa. Other reports, such as Martin and co-authors, demonstrated that oligozoospermic samples have an increased probability of sperm chromosome abnormality, whether from mild to severe oligozoospermia, whereas chromosomal abnormalities of spermatozoa are not higher in aging males."
There is no consensus on genetic abnormalities; young men can produce abnormalities and older men may not. Most importantly, chromosomal abnormalities are not higher in aging males.
In fact, the authors were surprised by their research.
The authors stated: "We have to admit that several pregnancies occurred from teratozoospermic men, with one case of pregnancy obtained from a 56 year old man with severe teratozoospermia."
Even relatively older men, in this case a 56 year old man, resulted in an unexpected pregnancy.
However, there are expected results: older women decline.
The authors state:
"Natural fertility rates decline in women as they enter the fifth decade of life. By the time of the perimenopause pregnancy rarely occurs, whether or not assisted reproductive techniques are initiated. However, if oocytes are donated by young women to older women, both embryo implantation and pregnancy rates are restored to normal levels in recipients."
Donations by young women can restore older women to normal levels.
On the other hand, for men, "in some cases fertility may be preserved up to a very old age, especially if the ICSI method, that permits one `to fish out' normal spermatozoa in moderate and severe teratozoospermic samples, is successfully employed."
Men can be fertile up to an undetermined, but very old age, and the authors did not find a correlation between aging men and abnormalities.
Male age influences oocyte-donor program results Eliezer Girsh & Nathan Katz & Leonid Genkin & Ofer Girtler & Jaron Bocker & Sofa Bezdin & Ilya Barr
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