Class Numbers Added - 2025 Summer Edition 

New Number 

Class Name 

Former Number(s) 

 QV 176

 Tocolytic agents 

 WK 102

 QV 200

 Lipid regulating agents

 None

 QV 205

 Hypoglycemic agents 

 WK 825

 W 20.55.D5

 Diffusion of innovation

 None

 W 20.55.O6

 Operations research

 None

 W 26.55.A5

 Algorithms

 W 26.5

 W 26.55.C5

 Cloud computing

 None

 W 26.55.C58

 Computer security

 W 26.55.C7

 W 26.55.D13

 Data science

 None

 W 26.55.D14

 Data visualization

 None

 W 26.55.D17

 Database management systems

 W 26.55.I4

W 26.55.I2

Image processing, Computer-assisted

None

W 26.55.I35

 Information storage and retrieval

W 26.55.I4

 W 26.55.M2

 Machine learning

 W 26.55.A7

 W 26.55.M25

 Mathematical computing

 None

 W 26.55.M4

 Medical informatics applications

 W 26.5

 W 26.55.S4

 Signal processing, computer-assisted

 W 26.5

 W 26.55.S9

 Systems analysis

 None

 W 26.55.T4

 Telecommunications

 None

 WA 548

 Reproductive health services (Table-G)

 WQ 200

 WA 548.1

 [Reproductive health services] General coverage (Not Table-G)

 WQ 200.1

 WB 355

 Placebos. Placebo effect

 WB 330

 WH 710

 Lymphoid tissue

 WH 700

 WK 90

 [Endocrine system] General works

 WK 100

 WK 105

Androgens. Androgen antagonists

 WK 755

 WK 110

 Estrogens. Estrogen antagonists

 WP 522

 WK 112

 Estrogen replacement therapy

 WP 522

 WK 220

 Thyroid diseases (General or not elsewhere classified)

 WK 200

 WK 517

 Growth hormone

 WK 515

 WK 812

 Diabetes mellitus, Type I

 WK 810

 WK 835.5

 [Diabetes complications] Specific complications, A-Z

 WK 835

 WK 835.5.A5

 Diabetic angiopathies

 WK 835

 WK 835.5.C2

 Diabetic cardiomyopathies

 None

 WK 835.5.C6

 Diabetic coma

 WK 830

 WK 835.5.D2

 Diabesity

 None

 WK 835.5.F5

 Diabetic foot

 WK 835

 WK 835.5.K4

 Diabetic ketoacidosis

 WK 830

 WK 835.5.N3

 Diabetic nephropathies

 WK 835

 WK 835.5.N6

 Diabetic neuropathies

 WK 835

 WK 835.5.R3

 Diabetic retinopathy

 WK 835

 WK 925

 Corpus luteum hormones

 WP 530

 WK 930

 Gonadal steroid hormones

 WK 900

 WK 932

 Female gonadal steroid hormones

 None

 WK 933

 Male gonadal steroid hormones

 None

 WK 935

 Estradiol congeners

 WP 522

 WK 940

 Progesterone congeners

 None

 WK 945

 Testicular hormones. Testosterone congeners

 WJ 875

 WO 226.5

 [Anesthesia and analgesia] Informatics. Electronic data processing. Computers

 None

 WP 20.5

 Reproductive medicine as a profession. Ethics. Peer review

 WQ 200

 WP 50

 Reproductive health. Reproductive history (Table-G)

 WQ 200

 WP 50.1

 [Reproductive health. Reproductive history] General coverage (Not Table-G)

 WQ 200.1

 WP 620

 Reproductive techniques (General or not elsewhere classified)

 WQ 208

 WQ 180

 Perinatal care

 WQ 210

 WQ 201

 Pregnancy in Adolescence (General)

 WQ 215-WQ 270

 WQ 208.2

 Artificial insemination

 WQ 208

 WQ 208.4

 Fertilization in vitro

 WQ 208

 WQ 209.5

 Fetal monitoring

 WQ 209

 WQ 254

 High-Risk pregnancy

 WQ 240

 WQ 445

 Induced abortion

 WQ 440

 WQ 507

 Postpartum depression

 WQ 500

 WS 462.5.S55

 [Adolescent psychology] Smoking. Tobacco use

 None

Class Numbers Canceled - 2025 Summer Edition 

Canceled Number 

Class Name 

Now Classed in 

 QU 87

 Hypolipidemic agents 

 QV 200

 WJ 875

 Testicular hormones and antagonists

 WK 945

 WK 180

 Renal hormones 

 WJ 301

 WK 201

 [Thyroid gland] Anatomy. Histology. Embryology. Abnormalities

 WK 200

 WK 267

 [Thyroid diseases] Medical therapy

 WK 265

 WK 400

 Thymus gland

 WH 710

 WK 501

 [Pituitary gland] Anatomy. Histology. Embryology

 WK 500

 WK 701

 [Adrenal glands] Anatomy. Histology. Embryology. Abnormalities

 WK 700

 WK 702

 [Adrenal glands] Physiology. Biochemistry

 WK 700

 WK 801

 [Islets of Langerhans] Anatomy. Histology. Embryology

 WK 800

 WK 802

 [Islets of Langerhans] Physiology. Biochemistry

 WK 800

 WK 825

 Other hypoglycemic agents

 QV 205

 WK 830

 Diabetic ketoacidosis. Diabetic coma

 WK 835.5.C6; WK 835.5.K4

 WK 840

 Diabetes as a complication in other conditions

 WK 835

 WK 870

 Glycosurias

 QU 260.5.G6

 WK 920

 Placental hormones

 WQ 212

 WP 520

 Endocrine functions of the ovaries

 WP 320

 WP 522

 Estrogenic hormones and antagonists

 WK 110; WK 935

 WP 530

 Corpus luteum hormones and related compounds

 WK 925; WK 940

 WQ 90

Reproductive health surveys (Table-G)

WP 50

 WQ 90.1

[Reproductive health surveys] General coverage (Not Table-G)

WP 50.1