hehe from my first pregnancy, i think the high high spikes irregularly means contractions, normally the spiking will be very small and short and quite regular. Then the other one is monitoring baby's heartbeat should be quite constant/regular, i think should be between 110-160 ?wah yours got the CTG thing ..
anyway all these things we see already also won't understand one =X hahaha
But I look more at the contractions part. haha.