A couple is mysteriously transported to another planet. They make contact with their adult kid who connects them with a n astronomer; Donavan. He was they guy they wrote ‘wow’. SETI. The WOW signal is decoded. It is from this couple on Planet X. It is determined that they are in another galaxy. After review is the electronic footprint from their departure it is determined how to bring them back.
After the mysterious teleport. The same signal is being broadcast as the wow signal. A precious couple was transported back then. Now they they decided the new signal. The old signal makes sense. SOS. Help us.
During the time away, the new planet has no life forms. However the atmosphere provides oxygen and foot just by breathing.
The couple becomes pregnant.
As they are working with SETI to bring them back they must decide to lose the baby.
But the seti process transports them to another planet. One similarl to earth. But one without humans. Until now. The baby made it and is going to be born.