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 ...

Individuals with factors that increase the risk of preterm birth—such as a prior preterm birth, a short cervix, multiple ...

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 ...