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 first stage of labour is when contractions gradually open up the cervix, which is the neck of your womb (uterus). It consists of early labour, active labour, and the transitional phase. During pregnancy, your cervix is closed and plugged with mucus, to keep out infection.