The relationship of gestational age to vitamin A induced postnatal dysfunction,

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Abstract
In an effort to determine the relationship between time of administration and consequent behavioral effects on progeny, a uniform sub-teratogenic dose of vitamin A (80,000 i.u./kg) was administered to gravid Sprague-Dawley rats during one of five periods of gestation (days 5-7, 8-10, 11-13, 14-16 and 17-19). Offspring were examined for changes in rate of weight gain, locomotor activity and maze learning ability (T-maze with return to nest as, reward and multiple T water maze escape). Vitamin A 8-10 animals were hyperactive, vitamin A 11-13 animals acquired T-maze slower than controls and both vitamin A 8-10 and 11-13 acquired water maze slower than controls. Vitamin A 11-13 animals were significantly lighter than controls and all other vitamin A groups.