| 1. | Earthworms have been used in testing pregnancy .
蚯蚓被用于妊娠反应试验。 |
| 2. | The results of her pregnancy test were negative .
她的妊娠试验结果呈阴性。 |
| 3. | Gestation extends from fertilization to birth .
妊娠期系指从配种到分娩之间的时间。 |
| 4. | Blood progesterone remains constant throughout pregnancy .
血液孕酮含量在全妊娠期保持不变。 |
| 5. | The corpus luteum of the previous pregnancy regresses very rapidly .
前次妊娠的黄体很快开始退化。 |
| 6. | Pregnant and nursing women should be given supplementary vitamin a .
妊娠和授乳中的妇女应该服用额外的维生素A。 |
| 7. | The duration of pregnancy may be influenced by the endocrine functions of the fetus .
胎儿的内分泌机能亦可影响妊娠期。 |
| 8. | The immediate and important effects of feed intake in pregnancy are upon birth weight .
妊娠期饲料采食量直接而且极大地影响到仔猪初生重量。 |
| 9. | Supplementary folic acid is often prescribed for pregnant women during the last trimester
在妊娠最后三个月中的妇女，医生常常要让她们额外补用些叶酸。 |
| 10. | Some viral diseases are more severe during pregnancy, probably because of hormonal changes .
有些病毒病在妊娠期间比较严重，可能是由于激素变化引起的。 |
