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.
The cervix is rigid and closed before pregnancy, but it softens and elongates during pregnancy. However, during labor, the cervix shortens and dilates to allow the passage of your baby. Cervical shortening before 37 weeks of pregnancy increases your risk of giving birth to a premature baby.