Definition of 安定期 (あんていき)

noun
•
stable period (with ref. to pregnancy, typically from 4th month when the placenta is fully formed, morning sickness usually goes away and risk of miscarriage decreases)
Related Kanji
安 relax, cheap, low, quiet, rested, contented, peaceful
定 determine, fix, establish, decide
期 period, time, date, term