The researchers are now studying the effect of maternal antibodies in pregnant mice.

研究者目前正在研究怀孕小鼠母体中抗体的作用。

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Antibodies in swine induced by classical swine fever inactivated vaccines were evaluated by IHA test, and the maternal antibodies in piglets were studied.

采用IHA实验方法监测猪瘟灭活疫苗免疫的猪抗体产生水平，并对仔猪母源抗体的消长规律进行了研究。

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For instance, breast-fed babies get a shot of maternal antibodies along with mother's milk.

NPR: Study: Breast-Feeding Decreases Cancer Risk

It may be reassuring to know, however, that shingles shortly after pregnancy should not cause problems for infants because specific maternal antibodies protect them until about 9 to 12 months of age.

CNN: Is it possible to get shingles after childbirth a second time?

Offering the jab to pregnant women between 28-38 weeks gestation will boost maternal antibodies against whooping cough and allow these to be passed to the unborn baby, giving them protection in the crucial first weeks of life.

BBC: Whooping cough vaccine a 'no-brainer' during pregnancy