Samsioe G, Crona N, Enk L, Järnfelt-Samsioe A
Acta Obstet Gynecol Scand. 1986;65(5):427-9. doi: 10.3109/00016348609157377.
It is a puzzling fact that emesis might occur in one pregnancy, whereas other pregnancies in the same woman could be either free or again associated with nausea. Pregnancy-associated hormones are believed to cause nausea, possibly through effects mediated via the liver. In 43 women who applied for a legal abortion in early pregnancy the occurrence of nausea was recorded and the position and size of the corpus luteums were measured by means of ultrasound. It was found that emesis was associated with corpus luteum located predominantly on the right side, while the non-emetic pregnancy often had a left-sided corpus luteum. It is suggested that the venous drainage, which differs between the right and the left side, may be responsible for the fact that the same woman can either suffer from or be free from nausea during pregnancy. Ovarian vein insufficiency, being more common in multigravidity, may also explain why nausea is more common in multigravidae.
一个令人困惑的事实是，呕吐可能在一次妊娠中出现，而同一女性的其他妊娠可能没有恶心症状，或者再次出现恶心症状。妊娠相关激素被认为会导致恶心，可能是通过肝脏介导的作用。在43名申请早期人工流产的女性中，记录了恶心的发生情况，并通过超声测量了黄体的位置和大小。结果发现，呕吐与主要位于右侧的黄体有关，而无呕吐症状的妊娠黄体通常位于左侧。有人提出，左右两侧静脉引流不同，可能是同一女性在孕期要么出现恶心、要么没有恶心症状的原因。卵巢静脉功能不全在多产妇中更常见，这也可以解释为什么恶心在多产妇中更常见。
