Hypertension Research in Pregnancy
Online ISSN : 2187-9931
Print ISSN : 2187-5987
ISSN-L : 2187-5987
Letter to the Editor
Expected reduction in the number of births due to the COVID-19 pandemic and proposal for countermeasures
Jun TakedaMasao Nakabayashi
Author information

2020 Volume 8 Issue 2 Pages 65-66


To the Editor:

In recent years, Japan has faced a rapidly and continuously declining birth rate similar to or even worse than those of other developed countries. The global COVID-19 pandemic in 2020 has further exacerbated this. Our purpose for writing this letter is to raise awareness on the relationship between the COVID-19 pandemic and declining birth rate in Japan.

The COVID-19 pandemic in Japan noticeably worsened at the end of March 2020, and with the government’s declaration of a state of emergency, people voluntarily refrained from going outside unless urgently needed until June. If women became pregnant during this period, their estimated due dates would be in the first three months of 2021. Thus, we investigated the number of delivery appointments for these three months.

The number of births in 2019 was 865,239, which amounts to a 5.8% decrease compared to the year before.1) If this decreasing trend continues this year, then the number of delivery appointments at delivery facilities should decrease by about 5%. However, in reality, the decrease is even greater (Figure). The difference of approximately 10–25% is not the result of a spontaneous decrease in the number of births, but likely due to another factor. Part of this difference might be explained by the temporary postponing of assisted reproductive technology in view of the statement set forth by the Japan Society for Reproductive Medicine (April 1, 2020).2) However, the entire difference cannot be solely pinned on this. Hospitals which provided data for this study are tertiary hospitals, as well as perinatal medical centers that take on cases of maternal transport or fetal congenital anomalies, which might be included in delivery appointments. However, given the magnitude of the difference, we view the avoidance of becoming pregnant due to fears of COVID-19 to be a major contributing factor.


Rate of change in birth appointments from 2019.

Birth appointments from January to March 2020 in three different hospitals are compared to actual birth numbers from the previous year. All numbers decreased more than the expected decrease of 5.8%, except at Hospital B in March.

We propose the following three measures. First, a national survey of birth appointments should be conducted. Second, trends of decreasing birth appointments should be closely and continuously monitored. Lastly, the public should be provided with accurate information regarding the relationship between maternal and neonatal COVID-19 infection.

For the first measure, the use of data limited to tertiary hospitals and urban areas paints the picture that the COVID-19 situation is worse compared to rural areas. Thus, data from rural areas and local clinics should also be examined to determine whether similar trends are observed.

For the second measure, the postponement of assisted reproductive technology was temporary and has now returned to normal after another announcement from the Japan Society for Reproductive Medicine.3) Yet, the COVID-19 situation has only slightly improved with the government’s declaration of a state of emergency. Thus, it will be important to monitor how long the trend will continue and whether it will recover. If the trend to refrain from becoming pregnant persists, this could lead to a further decline in birth rate, although it could also potentially lead to a baby boom, similar to what was observed after World War II and the year of Hinoeuma in 1966 (zodiac superstitions suggesting it was bad to be born that year). However, a baby boom would occur only if the COVID-19 situation is resolved with the development of a vaccine or effective medication. In either case, measures should be planned and led at the society level.

For the last measure, if the trend to avoid pregnancy continues, obstetricians should make efforts to spread accurate information about the relationship between COVID-19 and pregnancy. Although COVID-19 is associated with a high prevalence of preeclampsia, the severity during pregnancy is less than that observed with severe acute respiratory syndrome-related coronavirus (SARS), Middle East respiratory syndrome-related coronavirus (MERS), and influenza.4,5) Moreover, women and younger patients have lower rates of severe disease than men and older patients.6) Thus, excessive anxiety can potentially be avoided by providing accurate information.

© 2020 Japan Society for the Study of Hypertension in Pregnancy