Improving the production of lamb may be the result of (1) more lambs per birth, (2) more frequent childbirth (including those under dry sheep), (3) a higher proportion of sheep in the herd of cattle (for example, breeding females and increase the longevity of the herd of sheep), and (4) loss of small dead lambs from birth to market. The logic in most of these factors is obvious, but perhaps not all. For example, more frequent deliveries usually involves some type of birth rate, but the presence of dry sheep birth reduces the frequency in a herd. The increased longevity of sheep reduced the need for replacement and the proportion of lamb production can be traded. reproductive efficiency should be measured as net lambs reared to weaning or market. This underlines the importance of the loss of death of lambs as a source of loss of reproductive efficiency.

Ovulation rate (number of eggs released from the ovary in heat) sets the upper limit for the harvest of the Lamb of data reproduction. However, the presence of an egg is not a guarantee of a live animal market, which is considerable wastage reproduction. Losses can occur due to lack of fertilization or implantation, abortion or stillbirth or death of the lamb after birth. Thus, attempts to improve reproductive efficiency should be affected by the ovulation rate and wastage and loss of reduced lamb embryos. The first step in improving reproductive efficiency is the realization of genetic potential of cattle through effective management. At the same time, we must strive to increase the genetic potential. Options include the choice of reproductive efficiency in the herd, the transition to a more prolific career, or the development of a breeding program to increase the genetic potential. These approaches are not mutually exclusive. There must be considerable interaction between environmental conditions, management systems, breed selection and breeding. GM tends to be permanent and may be a more economical way to improve the reproductive efficiency of environmental changes or management changes, which usually must be repeated regularly. However, better management may authorize the use of a genotype with a high potential for delivery.