Is a woman permitted to refrain from attempting to conceive again if it causes her physical and psychological pain, and if her husband agrees?

It is permissible to temporarily cease procreation for a valid reason, such as avoiding health harm or unbearable hardship, but it is not permissible to cease it permanently except out of necessity. Allah may bless one with a righteous child, and it is advised to seek Allah's help and increase seeking forgiveness as a means to procreation.