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					Vaccine
Pharmaceutical compound
Androvax, also known as androstenedione:human serum albumin conjugate, is an immunogen and vaccine against androstenedione that is used in veterinary medicine to increase the ovulation rate and number of lambs born to ewes.[1][2][3] It is a conjugate of androstenedione and human serum albumin.[1][3] The drug is marketed in New Zealand.[1][3]
Androvax produces immunity against androstenedione, and the generation of antibodies against androstenedione decreases circulating levels of androstenedione.[1] In addition, since androstenedione is the major precursor of estrogens, estrogen levels are decreased as well.[1] This is thought to result in reduced negative feedback on the hypothalamic-pituitary-gonadal axis and increased gonadotropin secretion, which in turn improves fertility and fecundity.[1]
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Androgens (incl. AASTooltip anabolic–androgenic steroid) |  | 
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| Antiandrogens | | ARTooltip Androgen receptor antagonists |  | 
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 Steroidogenesis inhibitors |  | 
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 | Antigonadotropins | 
- D2 receptor antagonists (prolactin releasers) (e.g., domperidone, metoclopramide, risperidone, haloperidol, chlorpromazine, sulpiride)
 
- Estrogens (e.g., bifluranol, diethylstilbestrol, estradiol, estradiol esters, ethinylestradiol, ethinylestradiol sulfonate, paroxypropione)
 
- GnRH agonists (e.g., leuprorelin)
 
- GnRH antagonists (e.g., cetrorelix)
 
- Progestogens (incl., chlormadinone acetate, cyproterone acetate, hydroxyprogesterone caproate, gestonorone caproate, medroxyprogesterone acetate, megestrol acetate)
  
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 | Others |  | 
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| Estrogens | | ERTooltip Estrogen receptor agonists | 
- Steroidal: Alfatradiol
 
- Certain androgens/anabolic steroids (e.g., testosterone, testosterone esters, methyltestosterone, metandienone, nandrolone esters) (via estrogenic metabolites)
 
- Certain progestins (e.g., norethisterone, noretynodrel, etynodiol diacetate, tibolone)
 
- Clomestrone
 
- Cloxestradiol acetate
 
- Conjugated estriol
 
- Conjugated estrogens
 
- Epiestriol
 
- Epimestrol
 
- Esterified estrogens
 
- Estetrol†
 
- Estradiol
 
- Estradiol esters (e.g., estradiol acetate, estradiol benzoate, estradiol cypionate, estradiol enanthate, estradiol undecylate, estradiol valerate, polyestradiol phosphate, estradiol ester mixtures (Climacteron))
 
- Estramustine phosphate
 
- Estriol
 
- Estriol esters (e.g., estriol succinate, polyestriol phosphate)
 
- Estrogenic substances
 
- Estrone
 
- Estrone esters
 
- Ethinylestradiol#
 
- Hydroxyestrone diacetate
 
- Mestranol
 
- Methylestradiol
 
- Moxestrol
 
- Nilestriol
 
- Prasterone (dehydroepiandrosterone; DHEA)
 
- Promestriene
 
- Quinestradol
 
- Quinestrol
  
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 | Progonadotropins |  | 
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| Antiestrogens | ERTooltip Estrogen receptor antagonists (incl. SERMsTooltip selective estrogen receptor modulators/SERDsTooltip selective estrogen receptor downregulators) |  | 
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 | Aromatase inhibitors |  | 
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 | Antigonadotropins | 
- Androgens/anabolic steroids (e.g., testosterone, testosterone esters, nandrolone esters, oxandrolone, fluoxymesterone)
 
- D2 receptor antagonists (prolactin releasers) (e.g., domperidone, metoclopramide, risperidone, haloperidol, chlorpromazine, sulpiride)
 
- GnRH agonists (e.g., leuprorelin, goserelin)
 
- GnRH antagonists (e.g., cetrorelix, elagolix)
 
- Progestogens (e.g., chlormadinone acetate, cyproterone acetate, gestonorone caproate, hydroxyprogesterone caproate, medroxyprogesterone acetate, megestrol acetate)
  
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 | Others |  | 
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| Vaccines |  | 
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