german shepherd pregnancy problems

Question
Mags is a 4 year old German shepherd (dob-1-11-04).  She has had 2 false pregnancies.  Never had pups.  I am trying to breed her.  What can cause false pregnancies and how is it corrected?  Zee also 4 years gave signs of pregnancy, but no pups.  Peg (12-5-05) through out her estrus cycles just sits down and will not even let a male near her.  I have used different males who have bred others with success.

Answer
Hi Conna

Are all these females related?  False pregnancies is common enough and occurs 6 to 10 weeks after estrus. But to have three in one kennel raises a red flag for me.  

It most cases where females experience false pregnancies, studies have shown that they have a higher rate of always going through them and it's recommended that the female be spayed.  However, it is yet to be determined why that is the case.

I would check thyroid levels and also if these females haven't caught, progesterone levels to ensure you are breeding them at the optimal time. I would also administer a low dosage of amoxicillian to ensure that a virus isn't causing the sperm or eggs to die off.

Good luck