Translation of rückläufig

I hope you could understand my last letter to you. You see, when I write in Spanish I am not very confident. I always question myself and each and every sentence takes about fifteen minutes.
They are actually lovely hills and do not look threatening at all. That shows us that she actually loves her pregnancy and does not know what to do about it. One can really pitty this woman.
On the way we visited many small hill tribe villages. The walk was through green, wet rice fields. We really enjoyed it. Our guide explained us about the region and taught us some Vietnamese.