The Phalanges of the Foot  The phalanx ends in a crescent-shaped rough cap of bone epiphysis — the apical tuft (or ungual tuberosity/process) which covers a larger portion of the phalanx on the volar side than on the dorsal side. Two lateral ungual spines project proximally from the apical tuft. Near the base of the shaft are two lateral tubercles. Between these a V-shaped ridge extending proximally serves for the insertion of the flexor pollicis longus. Another ridge at the base serves for the insertion of the extensor aponeurosis. The flexor insertion is sided by two fossae — the ungual fossa distally and the proximopalmar fossa proximally. Development
The number of phalanges in animals is often expressed as a "phalangeal formula" that indicates the numbers of phalanges in digits, beginning from the innermost medial or proximal. For example, humans have a 2-3-3-3-3 formula for the hand, meaning that the thumb has two phalanges, whilst the other fingers each have three. In the distal phalanges of the hand the centres for the bodies appear at the distal extremities of the phalanges, instead of at the middle of the bodies, as in the other phalanges. Moreover, of all the bones of the hand, the distal phalanges are the first to ossify.: 6b. 3. The Phalanges of the Hand

Function
The distal phalanges of ungulates carry and shape nails and claws and these in primates are referred to as the ungual phalanges.
Urinary preparations
Purified urinary FSH (75 IU FSH and ≤ 2 IU of LH)Generic
urofollitropin for injection, purified.Brands
Bravelle, U.S., (≤ 2 IU LH)
Metrodin, U.S. and Canada, (≤ 1 IU LH)
Fertinorm Hp, (Canada)Highly purified urinary FSH (75 IU FSH and ≤ 0.1 IU LH/1000 IU FSH)Generic
urofollitropin for injection, (highly) purified.Dosage
typically 75 - 300, but as high as 600 IU / dayBrands
Fertinex (≤ 0.1 IU LH/1000 IU FSH)

Recombinant preparations
Follitropin alfaGeneric
Follitropin alfa injectionBrandsGonal-f
Cinnal-f
Fertilex
Ovaleap
BemfolaFollitropin betaGeneric
follitropin beta injectionBrands
Follistim AQ
PuregonFollitropin deltaGeneric
follitropin delta injectionBrands
RekovelleThe package insert for Gonal-f states that based on physio-chemical tests and bioassays that follitropin beta and follitropin alfa are indistinguishable. Two studies showed no difference. However, a more recent study showed there may be a slight clinical difference, with the alfa form tending towards a higher pregnancy rate and the beta form tending towards a lower pregnancy rate, but with significantly higher estradiol (E2) levels.The package insert for Puregon states that structural analysis shows that the amino acid sequence of follitropin beta is identical to that of natural human follicle stimulating hormone (hFSH). Further, the ogliosaccharide side chains are very similar, but not completely identical to that of natural hFSH. However, these small differences do not affect the bioactivity compared to natural hFSH. Gonal-f was approved for medical use in the European Union in October 1995.Puregon was approved for medical use in the European Union in February 1996.Rekovelle was approved for medical use in the European Union in December 2016. Biosimilars
Ovaleap was approved for medical use in the European Union in September 2013.