Socio-economic status and fertility of couples examined for infertility, social status and fertility.

The clinical Fertility of 1000 couples consecutively examined for infertility during 1950-52 was assessed 20 years later by means of a questionnaire, and results were compared with their socio-economic class as defined by the Svalastoga classification. Examinations had included semen analysis performed in our laboratory. 51 couples with known sterility because of azoospermia were excluded.

The clinical value of morphological rating of human spermatozoa.

The clinical fertility of 1,077 men whose semen had been analyzed between 1950 and 1952, in terms of types of abnormal spermatozoa morphology according to the Hammen system with 14 types, was studied 20 years later by means of a questionnaire (785 replies i.e., 72.

Relation between number of immobile spermatozoa and pregnancies obtained during a twenty-year follow-up period immobile spermatozoa and fertility.

The clinical fertility of 1077 men examined with semen analysis including detection of number of immobile spermatozoa during the years 1950-52 was studied twenty years later with a questionnaire replied by 785 (72.9%). There was a significant relation (p less than 0.

Interrelations among the characteristics of human semen, and a new system for classification of male infertility.

The clinical fertility of 1077 men who underwent semen analysis during the years 1950 to 1952 was studied 20 years later using questionnaires returned by 785 men (72.9%). Decreasing fertility was correlated with decreasing sperm count (P less than 0.

Relation between spermatozoa motility and pregnancies obtained during a twenty-year follow-up period spermatozoa motility and fertility.

The clinical fertility of 1077 men with an infertility problem investigated with semen analysis including assessment of spermatozoa motility during the years 1950-52 was studied 20 years later using a questionnaire, replied by 785 (72.9%). Spermatozoa motility was assessed with a subjective method with four degrees--excellent, good, impaired and poor.

Has the fertility of Danish men declined through the years in terms of semen quality? A comparison of semen qualities between 1952 and 1972.

The semen analysis of 1,077 men examined in 1952 was compared with the semen analysis of 1,000 men examined in 1972 in order to assess if fertility in Danish men has declined during the period. The men on both occasions were examined because of a fertility problem. In 1952 6.

Relation between morphologically abnormal spermatozoa and pregnancies obtained during a twenty-year follow-up period.

The clinical fertility of 1077 men investigated with semen analysis including detection of morphologically abnormal spermatozoa during the years 1950-52 was studied 20 years later using a questionnaire replied to by 785 (72.9%). There was a significant correlation (P less than 0.

Relation between sperm count and semen volume, and pregnancies obtained during a twenty-year follow-up period.

The clinical fertility of 1077 men investigated with sperm analysis including sperm count and semen volume during the years 1950-52 was studied 20 years later using a questionnaire, replied by 785 (72.9%). There was a significant correlation (P less than 0.

Hammen semen quality classification and pregnancies obtained during a twenty-year follow-up period.

The Hammen semen quality classification system is a fertility index with six qualities based on sperm count, assessment of sperm motility, number of immotile spermatozoa, number of abnormal sperm heads, and sperm viability. It was developed by Hammen during the 1940s. In the present study, the fertility of 1077 men classified during the years 1950 to 1952 was assessed after 20 years.

Artificial insemination in Denmark by frozen donor semen supplied from a central bank.

A central semen bank in Denmark supplied deep-frozen semen. Selection of donors, freezing technique, and practical details about transport of specimens are described. In one of the gynaecological departments supplied with frozen semen, 22 out of 30 patients who had artificial insemination became pregnant.