Maternity blues
Maternity blues, also known as baby blues and postpartum blues, is a transient condition that 75-80% of mothers could experience shortly after childbirth with a wide variety of symptoms which generally involve mood lability, tearfulness, and some mild anxiety and depressive symptoms. Baby blues is not postpartum depression, unless it is abnormally severe.After the placenta is delivered, the placental "hormone factory" shuts down causing radical changes in hormone levels, and the woman can suffer symptoms due to withdrawal from the high pregnancy levels of estrogen, progesterone and endorphins. Combined with this shift in hormone levels is the physical, mental and emotional exhaustion - as well as sleep deprivation typical of parenting a newborn. All of these factors contribute to the condition.
Pain management during childbirth
Nitrous oxide has the added benefit of limited side effects.  Some mothers may experience some dizziness, nausea, vomiting, or drowsiness, however, since dosing is determined by the patient, once these symptoms begin she can limit her use.  The gas takes effect quickly, but also lasts a short period of time so she must hold the mask to her face in order to benefit from the effects of analgesia. There is very little effect to the baby since it is quickly eliminated by the baby as soon as it begins breathing. Evidence does not suggest any clinically significant risk factors in the use of nitrous oxide gas as opposed to other methods of pain management both non-pharmacologic and pharmacologic in terms of Apgar or cord blood gas.  There is also limited evidence to determine whether there are any increased occupational risks to the healthcare provider associated with the use of nitrous oxide.