Chinese Gender Predictor Accuracy for United Kingdom Women?

Chinese Baby Gender Predictor is the baby gender prediction by pregnant woman's age and conception month using the Chinese Baby Gender Prediction Calendar Chart. It helps couples to choose the baby gender before woman's pregnancy.

Many people doubt about the accuracy of Chinese Gender Predictor. We did some researches on the sex ratio of live birth from different countries to see how accurate Chinese Baby Gender Prediction Chart is. Years ago scientists form different countries had researched and reported that the seasons and regions affect the sex ratio at birth. For example, US National Center for Biotechnology Information published a study of the Association between Season of Pregnancy and Birth-Sex among Chinese in 2014. By using the same data, we study the relationship between Chinese Gender Predictor Chart and China sex ratio at Birth. We discovered that Chinese Baby Gender Predictor Chart is somewhat accurate but not precise in China. But this doesn't mean Chinese Baby Gender Predictor Chart is accurate for other countries.

Also, we analyze the birth data of USA sex ratio at birth to see if the Chinese Baby Gender Chart is accurate for USA women. The conclusion is that Chinese Baby Gender Chart doesn't work for USA women. Now we want to take a look on the data of live births in England and Wales provided by the Office for National Statistics of United Kingdom. The live births data of England and Wales is from 2014 September to 2017 August. There are 2,080,229 baby records, 1,013,373 girls and 1,066,856 boys. The sex ratio at birth (male births per female births) is 1.0527. We break down it into monthly sex ratio in the following.

United Kingdom Sex Ratio Statistic Survey Data

United Kingdom Birth Data 2014-2017
Birth MonthBoysGirls RatioSex RatioConception Month
Jan87417838101.0430April
Feb81063774541.0465May
Mar87757831351.0555June
Apr85545815681.0487July
May90941859951.0575August
Jun89446842251.0619September
Jul93339881631.0587October
Aug90816863191.0520November
Sep93120884021.0533December
Oct92612879711.0527January
Nov86952827781.0504February
Dec87848835531.0514March

May, June and July of birth months have higher sex ratios. Pregnancy lasts for about 280 days or 40 weeks. It's about 9 months. The conception months in August, September and October have more chances to have a baby boy in UK.

USA Sex Ratio Statistic Survey Data

Let's compare the USA sex ratio chart using the US natality data from 2007 to 2017, and then calculated the sex ratio at birth. There are 44,300,538 baby records, 21,631,917 girls and 22,668,621 boys. The sex ratio at birth is 1.0479. We break down it into monthly sex ratio in the following.

US Birth Data 2007-2017
Birth MonthSex RatioConception Month
Jan1.0464April
Feb1.0463May
Mar1.0482June
Apr1.0509July
May1.0534August
Jun1.0538September
Jul1.0500October
Aug1.0460November
Sep1.0458December
Oct1.0438January
Nov1.0455February
Dec1.0445March

April, May, June and July have higher sex ratio at birth. Pregnancy lasts for about 280 days or 40 weeks. It's about 9 months. The conception months in July, August, September and October are favorable to have a baby boy in USA.

Both UK and USA sex ratio charts have higher sex ratio in August, September and October of conception month. Therefore, Women in United Kingdom and USA have better opportunity to have baby boys if they conceive babies during the autumn.

Chinese Baby Gender Prediction Chart

The chart below is the Chinese Baby Gender Statistic Chart. The age in the chart is woman's Chinese age at conception. The month in the chart is the month of the conception. For the prediction, blue is for boy and pink is for girl.

Age Woman's Conception Chinese Lunar Month
123456789101112
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

We are interested which conception months have better chances to have a baby boy. Therefore, we sum up the boy counts for each month.

Lunar MonthNear ZodiacProximity MonthBoy Counts
1TigerFebruary16
2RabbitMarch15
3DragonApril15
4SnakeMay13
5HorseJune11
6SheepJuly11
7MonkeyAugust13
8ChickenSeptember16
9DogOctober14
10PigNovember12
11RatDecember13
12CowJanuary15

After the calculation, we find that January, February, March, April and September have higher boy counts.

September has higher boy count. It's a good month to conceive a baby boy, which is same to United Kingdom and USA. But pregnant months in the spring show better chance to have a baby boy in China, but not in United Kingdom and USA. Therefore, the Chinese Baby Gender Prediction Chart doesn't work for United Kingdom and USA women.

Sex Ratio at Birth of Germany, Singapore and Taiwan

According to the UK and USA sex ratio charts, August, September and October are good months to conceive baby boy in United Kingdom and USA.

We did the same study for Singapore sex ratio at birth data. July, August and September show higher sex ratios in both of Singapore and USA charts. We also studied and published a study for Taiwan sex ratio at birth data. August, September and October are also favorable to conceive baby boys for Taiwanese women. We also have Germany birth data from 1946 to 1995. July, August and September are good months to conceive baby boys in Germany. That means autumn is the best season to conceive for a baby boy.

Mother Ages and Chinese Baby Gender Chart

The Chinese Baby Gender Chart shows the women's age is the factor to affect the baby gender. Therefore, we want to check the sex ratio statistic data to see any connection with women's ages.

After studying the US birth data from 2007 to 2017, we find no connection between mother ages and sex ratios in USA. Several other studies have examined relationship between the age of mother or father to the birth sex ratio. They said mother age has no statistically significant impact on birth sex ratio. But younger fathers have higher chance to have male babies.

Recommend Zodiac-Lunar Months for Baby Gender Prediction Chart

Another issue in the Baby Gender Chart is the pregnant month. Most people think the pregnant months should use the Chinese Lunar Calendar. But Chinese Lunar Calendar needs extra lunar month every three years in order to synchronize the cycle of the sun. That means Chinese lunar year has 13 lunar months every three years. The Baby Gender Chart doesn't mention about the leap months. Some people have question about we should use the Chinese Zodiac (Stem-Branch) Months instead of the lunar months.

Therefore, we compromise the Chinese Zodiac Months with Chinese Lunar Months into new Zodiac-Lunar Months the following chart. The days of Zodiac-Lunar Months must in both of lunar month and its corresponding Zodiac month. We strongly recommend using Zodiac-Lunar Months for the Chinese Baby Gender Prediction Chart.