As a ruminant farmer or an intending ruminant farmer, you need to be well aware of the reproductive rate of any ruminant animal you would like to go into as this will guide and enable you understand exactly what you are actually venturing into and how long it is going to take you before you can get back your return on investment.
I always advice farmers never to invest or venture into any kind of Agricbusiness simply because they see their neighbors or friends doing it and they are turning out well, please understand that your expectations and the persons own are not the same. Therefore always carry out a detailed research study of any form of agricbusiness investment you wish to embark upon to know if it is something you would be willing to do before venturing into them.
Cows are usually pregnant for nine months (for example: Has the gestation period of 9months) and they usually give birth to one calf at a time, this means that a normal cow should deliver a calf once a year. However, there are rare occasions when a cow delivers twins. Now when they deliver twins, it is sure that one will be male and the other female.
The female will however be sterile for live because it has female reproductive features externally but internally they are those of a male.
See also: Natural Mating VS Artificial Insemination: Find out which is Better