I really wouldn't worry - it's excessive Vit A.
Vitamin A
There have been concerns about using vitamin A during pregnancy. These concerns came about for two reasons. One was the result of a women eating vast and regular amounts of liver during her pregnancy. Liver contains large amount of the animal form of vitamin A, which is known as retinol. The other instance was linked to the use of medications for acne during pregnancy. A number of these preparations contain synthetic vitamin A.
Research has shown that there can be a problem with high doses of retinol (the animal form of vitamin A) during pregnancy. A study in the New England Journal of Medicine found that pregnant women who take high doses of retinol on a daily basis increase their risk of having a handicapped baby. The danger threshold appeared to be daily doses in excess of 10,000iu, which give you a 1 in 57 chance of having a baby with birth defects. Interestingly, also the study also supported the fact that beta-carotene (the plant form of vitamin A) is a safer alternative to vitamin A. Apparently the retinoids (in the animal version) and not the carotenoids (in vegetable version) are the cause of birth defects. Even at high doses beta-carotene does not raise vitamin A levels in the body sufficiently to cause defects in an unborn baby.
Unfortunately, this type of information causes women to swing from one extreme to the other. Doctors have recommended that no vitamin A be taken during pregnancy, the consequence of which mean that deficiency is becoming a problem. Vitamin A deficiency during pregnancy can have devastating effects. Vitamin A has antioxidant and protective properties similar to those found in the mineral selenium, which can protect against cell mutation. It is essential for healthy eyes and animal studies show that a deficiency of vitamin A has produced animals with no eyes, eye defects, undescended testes and hernias of the diaphragm, which means that breathing can be a problem.
Even worse, women who develop pre-eclampsia have been found to be deficient in vitamin A but not beta-carotene. How can this occur? If there is a retinol deficiency, it's possible that the body isn't converting beta-carotene properly.
I will try and find out what 10,000 iu is in micrograms, but you really will be fine