| ACE | angiotensin-converting enzyme |
| AFI | amniotic fluid index |
| AMH | anti-Müllerian hormone |
| ANRQ | Antenatal Risk Questionnaire |
| APCR | activated protein C resistance |
| ARM | artificial rupture of membranes |
| β-hCG | beta human chorionic gonadotropin |
| bd | bis die (twice a day) |
| BMI | body mass index |
| BPD | biparietal diameter |
| bpm | beats per minute |
| BSL | blood sugar level |
| BV | bacterial vaginosis |
| CASA | cancer-associated serum antigen |
| CBAVD | congenital bilateral absence of the vas deferens |
| CDMR | caesarean delivery on maternal request |
| cfDNA | cell-free DNA |
| CGH | comparative genomic hybridisation |
| CGM | continuous glucose monitoring |
| CMV | cytomegalovirus |
| COCP | combined oral contraceptive pill |
| CRL | crown–rump length |
| CRP | C-reactive protein |
| CS | caesarean section |
| CST | cervical screening test |
| CT | computerised tomography |
| CTG | cardiotocograph |
| CVP | central venous pressure |
| D&C | dilatation and curettage |
| DASS | Depression Anxiety Stress Scale |
| DC | dichorionic |
| DCDA | dichorionic diamniotic |
| DM | diabetes mellitus |
| DMPA | depot medroxyprogesterone acetate |
| DNA | deoxyribonucleic acid |
| EC | emergency contraception |
| ECG | electrocardiogram |
| ECV | external cephalic version |
| ED | emergency department |
| EDC | expected date of confinement |
| EDD | expected date of delivery |
| EFT | estimated fetal weight |
| EMA | early medical abortion |
| eMR | electronic medical record |
| EPDS | Edinburgh Postnatal Depression Scale |
| ERCS | elective repeat caesarean section |
| EUA | examination under anaesthesia |
| FAST | focused assessment with sonography for trauma |
| FBC | full blood count |
| fFn | fetal fibronectin |
| FISH | fluorescence in-situ hybridisation |
| FNT | fetal nuchal translucency |
| FSH | follicle stimulating hormone |
| FTA-AbS | fluorescent treponemal antibodies |
| FVL | factor V (Leiden) gene mutation |
| FVS | fetal varicella syndrome |
| GA | general anaesthetic |
| GBS | group B streptococcus |
| GDM | gestational diabetes mellitus |
| GnRH | gonadotrophin releasing hormone |
| GP | general practitioner (family doctor) |
| GTD | gestational trophoblastic disease |
| GTT | glucose tolerance test |
| Hb | haemoglobin |
| HbA1c | glycosylated haemoglobin |
| hCG | human chorionic gonadotropin |
| HCV | hepatitis C virus |
| HELLP | haemolysis, elevated liver enzymes, low platelets |
| HMB | heavy menstrual bleeding |
| HPV | human papillomavirus |
| HSG | hysterosalpingogram |
| HSIL | high-grade squamous intraepithelial lesion |
| HSV | herpes simplex virus |
| HT | hormone therapy |
| HZV | herpes zoster virus |
| IgA | immunoglobulin A |
| IgM | immunoglobulin M |
| IM | intramuscular |
| IMI | intramuscular injection |
| IQR | interquartile range |
| IU | international unit(s) |
| IUCD | intrauterine contraceptive device |
| IUGR | intrauterine growth restriction (or retardation) |
| IV | intravenous |
| IVF | in vitro fertilisation |
| LBC | liquid-based cytology |
| LDH | lactate dehydrogenase |
| LFT | liver function test |
| LH | luteinising hormone |
| LLETZ | large loop excision of the transformation zone |
| LMP | last menstrual period |
| LMWH | low-molecular-weight heparin |
| LNG | levonorgestrel |
| LNG-IUS | levonorgestrel-releasing intrauterine system |
| LSIL | low-grade squamous intraepithelial lesion |
| MCMA | monochorionic monoamniotic |
| MMR | measles, mumps and rubella |
| MRCS | maternal-request caesarean section |
| MRI | magnetic resonance image/imaging |
| MSU | midstream urine |
| MTHFR | methyltetrahydrofolate reductase |
| NAAT | nucleic acid amplification test |
| NCSP | National Cervical Screening Program |
| NHS | National Health Service |
| NIPT | non-invasive prenatal (diagnostic) test |
| NSAID | non-steroidal anti-inflammatory drug |
| OA | occipito-anterior |
| OGTT | oral glucose tolerance test |
| PAPP-A | pregnancy-associated plasma protein |
| PCOS | polycystic ovary syndrome |
| PCR | polymerase chain reaction |
| PCT | Primary Care Trust |
| PET/CT | positron emission tomography and computed tomography |
| pHSIL | possible high-grade squamous intraepithelial lesion |
| PI | pulsatility index |
| PID | pelvic inflammatory disease |
| pLSIL | possible low-grade squamous intraepithelial lesion |
| PMB | postmenopausal bleeding |
| po | per orem (by mouth) |
| POGTT | pregnancy oral glucose tolerance test |
| PPROM | preterm prelabour rupture of membranes |
| PrEP | pre-exposure prophylaxis |
| PTB | preterm birth |
| PUL | pregnancy of unknown location |
| PV | per vaginam (by vagina) |
| RBC | red blood count |
| RMI | risk of malignancy index |
| ROMA | risk of malignancy algorithm |
| RNA | ribonucleic acid |
| RPR | rapid plasma reagin |
| RUQ | right upper quadrant |
| SCBU | special care baby unit |
| SCC | squamous cell carcinoma |
| SFH | symphysial fundal height |
| SGA | small for gestational age |
| SHBG | sex hormone binding globulin |
| SSRI | selective serotonin reuptake inhibitor |
| STI | sexually transmissible infection |
| TOL | trial of labour |
| TOLAC | trial of labour after caesarean |
| TOP | termination of pregnancy |
| TPHA | Treponema pallidum haemagglutination antibody |
| TPL | threatened preterm labour |
| TSH | thyroid-stimulating hormone |
| TTTS | twin-to-twin transfusion syndrome |
| UEC | urea, electrolytes and creatinine |
| UFH | unfractionated heparin |
| UPA | ulipristal acetate |
| UPC | urine protein:creatinine ratio |
| USS | ultrasound scan |
| UTI | urinary tract infection |
| VDRL | venereal disease research laboratories |
| VIN | vulvar intraepithelial neoplasia |
| VSCC | vulvar squamous cell carcinoma |
| VTE | venous thromboembolism |
| VZIG | varicella zoster immune globulin |
| VZV | varicella zoster virus |
| WHO | World Health Organization |