The only way to tell for sure if she is pregnant at 4 weeks is to have your veterinarian do an ultrasound scan. There is no other reliable way to tell. Some swelling of the mammary glands and abdomen can occur whether or not she is pregnant because most dogs have a certain degree of false pregnancy when they ovulate, even if not bred, especially as early as one month after ovulation An xray can show pregnancy AFTER 58 days in whelp since the skeletons of the whelps will have begun to calcify by that time...prior to that time only an ultrasound scan will show the fetuses. Keep in mind that an xray IS dangerous to developing fetuses just like it is to developing human babies so it should definitely NOT be done unless absolutely necessary to determine if the dog is really pregnant LATE in the pregnancy. With only one fetus or with a large, heavy dog it is often difficult to tell for sure without an xray done around the last week of pregnancy.

Member 641257 answered on 4/16/11. Helpful? / 0