I realize that this thread is about mothers feeling their own cervixes, but I just want to add a cautionary note suggesting that mothers NOT allow their doctors or midwives to check their cervixes in the weekly prenatal visits of their last month of pregnancy.
Mainstream-medically-minded doctors and midwives believe that these weekly cervical checks will tell them 1) how soon labor is likely to begin, 2) how well the baby's head will fit in the pelvis during labor, and 3) whether the baby is head down.
However, the truth is that 1) how dilated and effaced the cervix is will NOT accurately predict when or whether labor will start (women can go 3 wks with a cervix dilated 3 cm & 100% effaced, and women can start labor the next day with no dilation/effacement at all), and 2) the pelvis stretches when the baby is being born (yes, the 3 bones of the pelvis are connected by ligaments which are loosened by pregnancy hormones so that they will stretch), so before labor there is no way to predict how much that pelvis will stretch, and 3) there are much safer ways to assess whether the baby is head-down (as in abdominal palpation).
The risk of these weekly cervical checks is that they can set up an inflammation process in the cervix that can weaken the area of the bag which is nearest to the area of inflammation. Then when the bag has weakened enough, it can break the next time that the mother sneezes or coughs or otherwise increases the pressure in the uterus. This inflammation/weakening/breaking process typically takes about two days. The risk of having the bag break as the first step of the labor process is that it increases the likelihood of a deadline of 24 hrs for the birth to happen, which increases the need for pitocin, pain meds, epidurals, forceps, and C-sections, in the usual cascade process of hospital interventions.
I am not sure of whether a mother checking her own cervix in the last month can set up this inflammation process as well. But I would say that it's probably better to err on the side of caution, and that it's probably better to not disrupt that precious cervical mucous plug.
If you want more info on who I am.....