Thanks for your question. This is a very specific one which, to be fair, is best answered by your own obstetrician. There will be factors other than those you have mentioned which she or he will ...

Weekly Differences in the Prevalence of a Short Cervix at 18+0 to 23+6 Weeks of Gestation in Pregnant Women with and without a History of Preterm Delivery.

In some cases, an infection may be involved; in others, it may be an abnormally short cervix or a combination of factors. In about half of all cases, no cause can be found. The number of babies ...