Abstract:
Creatine is one of the most frequently or generally used ergogenic substances. It
is used by professional and amateur athletes and the “man on the street”.
Creatine is involved in energy production and protein synthesis in muscle.
Although studies have been carried out on the effect of creatine on adults, no
study has yet determined whether creatine would have an influence on the
developing rat foetus if taken by a female during pregnancy.
The aim of this study was thus to determine whether creatine had an effect on
the developing foetus.
Dams were divided into two groups, which we re injected between days 7-13 and
on days 9 and 11 only of intra-uterine development respectively. Each group was
subdivided into a control and two experimental groups. Experimental group one
received a low dose of creatine (53.5mg/250g body weight); the other
experimental group received a high dose of creatine (107mg/250g body weight).
The control group received an equal volume (1ml) of the vehicle (saline) in which
the creatine was constituted. Dams were sacrificed on day 20 of development.
The foetuses were removed and their weight and length taken. Foetuses were
examined for abnormalities. Two foetuses from each litter underwent skeletal
staining. Tissue was excised from the remaining foetuses and processed for
histology for histological investigation.
Creatine positively affected the growth of the foetuses of dams injected between
days 7-13, while foetuses of dams injected only on days 9 and 11 in the B-group
showed reduced growth. Creatine also had a slightly negative effect on the
histological structure of the liver, but enhanced skeletal muscle growth, endocrine
cell formation (pancreas) and skeletal formation.
From the results obtained it is hypothesized that creatine and insulin together
may play a positive role from implantation to birth, while creatine given at certain
stages of organogenesis delayed development of the foetus.
