score:3
While there may not be a direct answer, that is specifically answered in LDS (Mormons) doctrine, there are a few that together may provide an answer. The LDS have a strong belief in opposites.
For it must needs be, that there is an opposition in all things. If not so, my firstborn in the wilderness, righteousness could not be brought to pass, neither wickedness, neither holiness nor misery, neither good nor bad. Wherefore, all things must needs be a compound in one; wherefore, if it should be one body it must needs remain as dead, having no life neither death, nor corruption nor incorruption, happiness nor misery, neither sense nor insensibility.
The LDS also believe in having children and that they are a blessing. Elder Neil L. Anderson said:
It is a crowning privilege of a husband and wife who are able to bear children to provide mortal bodies for these spirit children of God. We believe in families, and we believe in children.1
The LDS understand that pain is part of being mortal2.
But like everything pain has it's opposite: joy, happiness, etc (which come later). (in my words)
On intense pain Elder Robert D. Hales said:
In the past two years, I have waited upon the Lord for mortal lessons to be taught me through periods of physical pain, mental anguish, and pondering. I learned that constant, intense pain is a great consecrating purifier that humbles us and draws us closer to God’s Spirit.3
See also:
The Family - A Proclamation to the World
1 https://www.lds.org/general-conference/2011/10/children?lang=eng
2 https://www.lds.org/general-conference/2005/10/the-sanctity-of-the-body?lang=eng
3 https://www.lds.org/general-conference/1998/10/healing-soul-and-body?lang=eng
Emphasis added by me