from Section II - Hormones and Gestational Disorders
Published online by Cambridge University Press: 09 November 2022
In multiple gestations, an increased fetal-placental mass is believed to be responsible for higher maternal levels of placental hormones, such as human chorionic gonadotropin, estrogens, progesterone, and others, compared to singleton gestations. While some of these differences may confer an advantage to twins in terms of chance of survival in early pregnancy, on the other hand they can increase the risk of developing pathological conditions in pregnancy, such as gestational diabetes and obstetric cholestasis, which seem to occur more frequently in multiple than in singleton gestations.
Twin pregnancies have an increased risk of pre-term delivery compared to singleton gestations, and the reason for this is not completely understood. Differences in placental hormone profiles and in the degree of uterine stretch might explain this effect. Furthermore, the pathophysiological mechanisms involved in pre-term delivery may require different preventive and therapeutic strategies compared to singleton pregnancies.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.