1. In Sui-lin Hsiang, Taiwan, 125 and 120 currently married women within child-bearing age were selected for study. The former group received on a daily basis a liquid diet containing 20 gm of milk protein and 400 kcal. The latter received a liquid diet with similar appearance, but with no protein; the calorie content was less than 40 kcal. Both liquids contain certain amount of minerals and vitamins. The two groups are abbreviated as PCVM and VM respectively.2. The cases were randomly selected and the interviewers were kept blind from knowing which group the cases belonged to.3. It was found that there was no statistically significant differences in case characteristics, incidences of pregnancies and outcomes of pregnancies.4. The only difference found between the two groups was the pregnancy interval immediately after the supplementation started. The PCVM group had a shorter interval than the VM group, even after controlled for practice of birth control and breast feeding.5. The difference, however is only 0.7 months, about 20 days, and thus although statistically significant, has little practical significance.