80810
A decrease or cessation in sensations of fetal activity may be an indication of fetal distress or death , though it is not entirely uncommon for a healthy fetus to exhibit such changes , particularly near the end of a pregnancy when there is considerably less space in the uterus than earlier in pregnancy for the fetus to move about .
 fetal distress
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 fetal distress