Fertility is the main component influencing total herd efficiency in beef cattle. This short communication reports on the effect of oestrous synchronisation followed by natural mating on calving percentage and distribution of calvings. The results for the first year show that a practical way to decrease the length of the breeding season is using oestrous synchronisation followed by natural mating.  The preliminary results also show that natural mating after oestrus synchronisation can increase conception rate, although these results are still inconclusive. Results show that cows calved earlier in the calving season and cows in anoestrus started cycling again.  If long calving seasons are shortened and calving percentage increase, more and heavier calves of a uniform age may be weaned.  Cows calving earlier in the season have a longer “recovery period” and haven the opportunity to calve in a better body condition during the next season, compared to cows calving late in the season.  Cows that calve early also have a better chance of conceiving in the next breeding season.