I don't think you should be helping with sheep if there's a chance you could be pregnant... found this info, see below:
Pregnant women should avoid close contact with sheep during lambing periods, the Departments of Health, the Department for Environment, Food and Rural Affairs, and the Health and Safety Executive advised today.
Pregnant women who come into close contact with sheep during lambing may risk their own health and that of their unborn child, from infections that can occur in some ewes. These include chlamydiosis (enzootic abortion of ewes - EAE), toxoplasmosis and listeriosis, which are common causes of abortion in ewes.
Although the number of reports of these infections and human miscarriages resulting from contact with sheep are extremely small, it is important that pregnant women are aware of the potential risks associated with close contact with sheep during lambing.
To avoid the possible risk of infection, pregnant women are advised that they should:
- not help to lamb or milk ewes;
- avoid contact with aborted or new-born lambs or with the afterbirth;
- avoid handling clothing, boots etc which have come into contact with ewes or lambs.
Pregnant women should seek medical advice if they experience fever or influenza-like symptoms or if concerned that they could have acquired infection from a farm environment.
Farmers have a responsibility to minimise the risks to pregnant women, including members of their family, the public and professional staff visiting farms. Any action should be determined by their risk assessment required under the Management of Health and Safety at Work Regulations 1999.
If a ewe aborts, farmers are advised to ask their veterinary surgeon to take a sample to their local Regional laboratory of the Veterinary Laboratories Agency to determine the cause. In the interests of hygiene, farmers should dispose of all afterbirths promptly and safely.