A record 393,745 in vitro fertilizations were performed in Japan in 2014, resulting in 47,322 births, also an all-time high, a recent tally showed.
The results mean one baby was born through IVF treatment for every 21 newborn infants, given that roughly 1 million babies are born annually in Japan, according to the survey by the Japan Society of Obstetrics and Gynecology.
The total number of children born through IVF treatment in Japan has reached 431,626 since the first baby in 1983.
According to the survey, 574 medical facilities carried out IVF treatments in 2014 among around 600 JSOG members nationwide.
Of those who underwent the treatment, women aged 40 or older accounted for roughly 40 percent, the tally showed.
The percentage of women who succeeded in giving birth stood at 20.6 percent at the age of 30, 18.1 percent at the age of 35, 8.8 percent at 40 and 4.4 percent at 42.