Vle CONG. INTERN. REPROD. ANIM. INSEM. ARTIF., PARIS, 1968, VOL. I

mitoses showed that the bull had 60,XX/60,XY (75%/25%) and the free-
martin 60,XX/60,XY (82.5%/17,5%). Fifty fibroblast mitoses contained
sex chromosomes which were similar to the phenotype. A count of loo
leucocyte mitoses when the bull was 1 year old showed that it had
60,XX/60,XY (80%/20%).

The sperm examinations were carried out during a period of 6 weeks
in February/March, 1968. Once a week two ejaculates were collected in
an artificial vagina, once three ejaculates were collected because the
first one seemed to be incomplete. All ejaculates were included in the
examination. The bull had not previously been used for collection of
semen or natural covering. A general examination of the sperm was
carried out, including volume, colour, consistency, impurities, pH,
concentration and motility. The concentration was measured photo-
electrically. From every ejaculate atleast two Indian ink preparatirns
were made. The abnormal sperms were classified according to Blom (1950).
From each of the 13 ejaculates looo sperms, distributed on at least
two slides, were analysed.

Sperm concentration and motility showed a distinct improvement
during the period of examination. All the investigated characteristics
were normal. Sperm morphology is described in Table 1. The number of
primary abnormalities was almost constant from one ejaculate to the
other. On average, the primary abnormalities in 13 ejaculates consti-
tuted 3.16% which is less than the normal value (4.65%). None of the
ejaculates showed considerable deviations from the values described by
Blom (1950). The number of secondary abnormalities had a tendency to
decrease during the period of examination. In some ejaculates the
number of sperms with distal droplet and sperms with bent tail were very
large. As these sperm abnormalities were below the normal values in

other ejaculates, they are presumabiy of no importance to the judgment.

Conclusion
An andrological examination of a Jersey bull with 80% XX leucocyte

mitoses showed a normal spermiogram and normal sexual organs. Thus, the

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