🔮 Boy or girl?

The Qing-dynasty Chinese gender chart — looked up by mum's lunar age and the lunar month of conception.

The chart says

The chart

Rows are mum's lunar age at conception (18–45); columns are the lunar month of conception. Your cell lights up once the dates are set.

Age 123456789101112
18 G B G B B B B B B B B B
19 B G B G G B B B B B G G
20 G B G B B B B B B G B B
21 B G G G G G G G G G G G
22 G B B G B G G B G G G G
23 B B B G B B G B G B B G
24 B G G B B G B G B B G B
25 G B G B G B G B B G B B
26 B B G B G B G B G G B G
27 G G B B G B G G B G B B
28 B G B G G B G B G B G G
29 G B G G B B G B B G B B
30 B G G G G G G G G G B B
31 B G B G G G G G G G G B
32 B G B G G G G G G G G B
33 G B G B G G G B G G G B
34 B B G B G G G G G G B B
35 B B B G B G G G B G B B
36 G B B G B G B G B B G G
37 B G B B G B G B G B G B
38 G B G B B G B G B G B G
39 B G B B B G G B G B G G
40 G B G B G B B G B G B G
41 B G B G B G B B G B G B
42 G B G B G B G B B G B G
43 B G B G B G B G B B B B
44 B B G B B B G B G B G G
45 G B B G G G B G B G B G

B boy · G girl

Just for fun — the chart is about as accurate as a coin flip. The morphology scan (18–20 weeks) or NIPT is the real answer.