Instruct: Identify the main category of Biorxiv papers based on the titles
Query: Growth differentiation factor 15 increases in both cerebrospinal fluid and serum during pregnancy
25
The categories of this paper are: bioengineering
21
The categories of this paper are: toxicology
9
The categories of this paper are: synthetic
28
The categories of this paper are: communication
13
The categories of this paper are: animal
14
The categories of this paper are: biophysics
18
The categories of this paper are: systems
11
The categories of this paper are: cognition
2
The categories of this paper are: biology
26
The categories of this paper are: biochemistry
3
The categories of this paper are: evolutionary
30
The categories of this paper are: scientific
31
The categories of this paper are: paleontology
8
The categories of this paper are: genomics
0
The categories of this paper are: genetics
27
The categories of this paper are: pathology