Throughout this website, we provide various kind information regarding the ancient Chinese baby gender prediction chart. The problem is how accurate is the chart? OK, we can do a quick test here to see if it really works.
You should already know that gender prediction from the Chinese Gender Predictor is based on two pieces of information, which are the Chinese lunar age at the time when the mom (to-be) got pregnant and the Chinese lunar month when the mom (to-be) conceived. With our predictor, we could actually examine the accuracy of the chart if we know the birthday of any woman and the birthday of her son/daughter.
We have chosen nine celebrity moms and their kids, mainly followed the list at a Huffington Post article, for our tests. The tests are based on the following assumptions.
- The birth dates, which are found in Wikipedia, are correct.
- Date of conception is calculated by subtracting 266 days from the birth date, as 266 days is the average gestation period for humans from conception to birth.
- Birthdate can be plus or minus 3 days of the actual due date
- The tests are for fun only. There is no medical proof to support the efficacy of the gender chart.
1. Katie Holmes and Suri Cruise
With the lunar date converter, we got the following information
| Mother’s (Katie) birthdate | Dec 18, 1978 |
| Daughter’s (Suri) birthdate | Apr 18, 2006 |
| The lunar month when the mother conceived | 6th |
| Mother’s lunar age at conception | 28 |
| Prediction | Girl |
| Prediction correctness? |  |
2. Jada Pinkett Smith and Jaden Smith
| Mother’s (Jada Pinkett) birthdate | Sep 18, 1971 |
| Son’s (Jaden) birthdate | Jul 8, 1998 |
| The lunar month when the mother conceived | 9th |
| Mother’s lunar age at conception | 27 |
| Prediction | Boy |
| Prediction correctness | |
3. Kris Jenner and Kylie Jenner
| Mother’s (Katie) birthdate | Nov 5, 1955 |
| Daughter’s (Kylie) birth date | Aug 10, 1997 |
| The lunar month when the mother conceived * | 10th |
| Mother’s lunar age at conception * | 42 |
| Prediction | Girl |
| Prediction correctness? | |
4. Beyoncé Knowles and Blue Ivy Carter
| Mother’s (Beyoncé) birth date | September 4, 1981 |
| Daughter’s (Blue Ivy) birth date | January 7, 2012 |
| The lunar month when the mother conceived | 3rd |
| Mother’s lunar age at conception | 31 |
| Prediction | Boy |
| Prediction correctness? |  |
| Remark: Lunar 31-year-old is the age heavily in favor of baby girl (see the chart). There are only three month at the age that are predicted to get a baby boy. Recall that a short conception period gives you a relatively low successful rate in gender prediction, and a single lunar month (lunar 3rd month in this case) is the shortest conception period at the chart. Furthermore, the long conception period (lunar 4th ~ 11th month) for girl may also affect the result next to it. |
5. Gwen Stefani and Kingston Rossdale
| Mother’s (Gwen) birthdate | October 3, 1969 |
| Daughter’s (Suri) birthdate | May 26, 2006 |
| The lunar month when the mother conceived | 7th |
| Mother’s lunar age at conception | 37 |
| Prediction | Girl |
| Prediction correctness? | |
| Remark: A single month is a short conception period (lunar 7th month in this case), and gender prediction could easily get wrong in these periods. Besides the date of conception was on the 29th lunar day, which was the end of the month. Given that the accuracy of prediction is only about 50% towards the beginning and ending of a conception period. It is not surprising that error occurred. |
6. Jennifer Lopez and her twins (Emme & Max)
| Mother’s (Jennifer) Birth date | July 24, 1969 |
| Daughter’s (Suri) birthdate | February 22, 2008 |
| The lunar month when the mother conceived * | 4th |
| Mother’s lunar age at conception * | 39 |
| Prediction | Boy |
| Prediction correctness? |  |
7. Victoria Beckham and Harper Beckham
| Mother’s (Victoria) birthdate | April 17, 1974 |
| Daughter’s (Harper) birthdate | July 10, 2011 |
| The lunar month when the mother conceived | 9th |
| Mother’s lunar age at conception | 37 |
| Prediction | Girl |
| Prediction correctness? | |
8. Deborra-Lee Furness and Oscar Jackman
| Mother’s (Deborra-Lee) birthdate | December 8, 1955 |
| Son’s (Oscar) birthdate | May 16, 2000 |
| The lunar month when the mother conceived | 7th |
| Mother’s lunar age at conception | 45 |
| Prediction | Boy |
| Prediction correctness | |
9. Mariah Carey and her twins
| Mother’s (Mariah) birthdate | March 27, 1970 |
| Twin’s (Monroe & Moroccan) birthdate | April 30, 2011 |
| The lunar month when the mother conceived | 6th |
| Mother’s lunar age at conception | 41 |
| Prediction | Girl |
| Prediction correctness? | |
We have 6 1/2 correct predictions from the Chinese Gender Chart, out of 9 case studies. So the success rate is about 70%, not too bad as a free gender predictor!