After trying for several years to conceive with husband Christopher Morgan, Fields said she didn't recognize the signs at first.
“Funny enough, for a minute I thought I was getting pre-menopausal ‘cause certain things were starting to be irregular and then other symptoms started -- my memory and I was clumsier than normal which I couldn’t even believe was possible," Fields said.
"Then our son got sick with a stomach virus and I caught it. Chris said, ‘No, babe, you’re a little sicker than Sebastian. You need to go and get that checked out’ and I said,’Okay.’ They tested me and said, ‘Oh honey, you’re not dehydrated. You’re two months pregnant.’”
The 44-year-old former "Facts of Life" actress said it hadn't been easy to give their 6-year-old son, Sebastian Alexander, a sibling.
“It was planned," she explained. "We’ve actually been trying for a couple years. We had gotten pregnant twice and [miscarried]... Chris and I were very blessed to really have one another, to have our family and friends and our God to really get us through that.”
Fields and Morgan, 37, were married in 2007.
Celebrity Families of 2014 [PHOTOS]