Mixing chemicals with waste in sewage holding tanks or septic. systems may produce toxic fumes, corrode pipelines and tanks, and. pollute soil and ground water when discharged. When chemicals, such as formaldehyde, are added to septic systems, they can cause. bacteria in the system to die.
The cervix is the opening to the womb. Itâs located between the vagina and the uterus and plays a crucial role in pregnancy and labor. During pregnancy, it remains closed and the opening is blocked with a mucus plug.
1 Dilation During Pregnancy In the weeks preceding labor, your body undergoes many changes 2  ... Cervical Changes When Pregnant The cervix is the portion of a womanâs anatomy that joins the uterus to the vagina. ... 3  Open Cervix During Pregnancy The cervix is the opening to the womb or the uterus.ou could even have a slightly dilated and soft cervix for several weeks, before you are actually ready to give birth. In fact, it is quite normal for your cervix to dilate up to 3 centimeters in the later stages of pregnancy. As the uterine contractions start, the cervix further opens to around 6 centimeters or so.