Why is the mothers mood erratic?

aFamilyToday Health - When the pregnant mother's body becomes heavy and her mood is easily sad and happy, she needs to apply these secrets to love life more.
aFamilyToday Health - When the pregnant mother's body becomes heavy and her mood is easily sad and happy, she needs to apply these secrets to love life more.
Young children with chest pain are not uncommon, usually occurring in children under 1 year old. So is there any solution to fix this problem or not?